---
title: "Truck Bed Mattress Review 2026: Havnby CloudCore Diagonal"
canonical: "https://teslamattress.com/reviews/havnby-cloudcore-diagonal-truck"
markdown_url: "https://teslamattress.com/reviews/havnby-cloudcore-diagonal-truck.md"
language: "en"
author: "Fredrik Mastouri"
checked: "not-provided"
content_updated: "2026-08-25"
evidence_scope: "secondary-research-summary"
source_scope: "visible page heading, answer and main content"
---

# Havnby CloudCore Diagonal Mattress for Truck Review

CloudCore Diagonal Truck: a 201 × 80 × 10 cm foam-and-air mattress sold under one SKU across 22 listed make-and-model combinations spanning seven truck brands. Evidence is limited to official Havnby material and competitor vendor pages checked 24 August 2026; no score or hands-on result is assigned.

Primary sources checked

## What the evidence can prove: Secondary research — no score assigned

Seller listing for live verification: August 24, 2026

The Havnby catalog snapshot and live product page, both checked 24 August 2026, support a clear mattress size, an observed $169 sale price, product weight, included accessories, a 660 lb weight limit, a 35-second inflate time, a 50-second deflate time and a 22-combination vehicle selector spanning seven brands. They do not support fit claims by specific truck bed length, an R-value or a consistent pump description. Three of the 22 catalog combinations (Toyota / Titan, Nissan / Tundra, Nissan / Cybertruck) do not match real vehicle nameplates, which weakens confidence in the selector as fitment evidence on its own. The HEST and Luno pages used for comparison are vendor-authored listings, not independent editorial reviews, so their published figures are treated as seller claims rather than test results.

[Official CloudCore Diagonal truck-fit listing](https://havnby.com/products/cloudcore-diagonal-mattress-for-truck) · [Havnby warranty terms](https://havnby.com/pages/warranty) · [Havnby return and 60-day trial terms](https://havnby.com/pages/returns-policy) · [HEST truck-bed mattress collection](https://hest.com/collections/truck-bed-mattresses) · [Luno Air Truck Bed Mattress listing](https://lunolife.com/products/air-truck-bed-mattress)

Seller specifications and hosted reviews can change. We identify missing evidence rather than converting product claims into test results.

[how we review Tesla mattresses →](/methodology)

Quick take **Secondary research — no score assigned**

CloudCore Diagonal is Havnby’s diagonal-layout truck-bed mattress, sold under one generic SKU across 22 make-and-model combinations spanning Ford, Chevrolet, GMC, RAM, Toyota, Nissan and Tesla. Havnby listed it at $169 sale against a $299 listed regular price when checked 24 August 2026, below HEST’s from-$279 and Luno’s $299.99 truck-bed mattresses. The catalog also contains three vehicle combinations that do not match real nameplates and a pump description that conflicts with the included-items list.

Price and next step

## Check the dated Havnby offer evidence

The linked internal record documents the Havnby offer evidence and its verification date. It does not promise that a discount or the observed price is still active.

Cart-verified August 19, 2026: code AWD cut a Havnby cart by 10%. That check ran on the FlatCore Hybrid Support Mattress for Tesla Model Y listing, not this product. The live cart is final.

We may earn a commission through links on this page [Affiliate disclosure](/disclosure)

[Review Havnby offer evidence →](/discounts/havnby)

[Discounts →](/discounts)

Practical ownership review

## Six checks before you buy

CloudCore Diagonal Truck is a 201 × 80 × 10 cm foam-and-air mattress sold under one generic SKU across 22 listed make-and-model combinations spanning Ford, Chevrolet, GMC, RAM, Toyota, Nissan and Tesla. The catalog provides a clear mattress size, an observed $169 sale price, product weight and included accessories for every listed vehicle. The live product page also publishes a 660 lb weight limit, a 35-second inflate time and a 50-second deflate time. Per-brand size differences and R-value are not published. This record separates those published facts from fit, comfort and durability outcomes that have not been independently established.

1. 01 **Packing and cargo space** The mattress is listed at 3.04 kg (6.7 lb) and a two-dimensional 72 × 34 cm (28.3 × 13.4 in) stored size. Havnby does not publish a third stored dimension or state whether the compress pump is packed inside that measurement or separately.
2. 02 **Fabric, foam and build quality** Havnby describes adjustable air support combined with a four-inch foam core in a narrow 31-inch (80 cm) layout, intended to use a short truck bed's longer diagonal while leaving space for gear alongside. The listing also names a baby-safe TPU shell and a seller-described high-quality foam core. Havnby does not publish foam density, the exact foam-to-air ratio, TPU grade or seam construction for this SKU.
3. 03 **Pump, power and setup** Feature copy states the pump is built into the mattress, while the included-items list names a separate “Compress pump × 1.” Havnby does not resolve this conflict. The live product page publishes a 35-second inflate time and a 50-second deflate time, but no pressure rating or power source is published for any of the 22 listed vehicle combinations.
4. 04 **Sleep quality and support** The published 201 × 80 cm (79.1 × 31 in) surface is designed for one sleeper placed diagonally across the bed, leaving room beside the mattress for equipment. Havnby publishes a 660 lb weight limit on the live product page, but does not publish an R-value, per-truck bed-length compatibility or tailgate clearance for any listed make or model, so buyers cannot confirm whether the same 201 cm length suits a short bed and a long bed equally well.
5. 05 **Cleaning, moisture and storage** A custom-fit sheet ships with the mattress, but Havnby does not publish wash settings, foam-care instructions, TPU-cleaner guidance or a puncture-repair procedure for this SKU. Care instructions published for a different Havnby model should not be applied to this product unless the delivered manual or label states the same guidance.
6. 06 **What remains unresolved** All 22 listed vehicle combinations share one generic SKU, so the fitment selector does not resize the mattress by brand or model; Three catalog combinations do not match real vehicle nameplates (Toyota / Titan, Nissan / Tundra, Nissan / Cybertruck); Feature copy claims a built-in pump while the included-items list names a separate compress pump, an unresolved conflict; Havnby does not publish an R-value, unlike HEST's published R-8.8 rating, and its published 660 lb weight limit is a whole-mattress figure, not the per-side rating Luno publishes

Manufacturer evidence

## Official CloudCore Diagonal Truck product views

These three images come from Havnby’s product gallery. They document the listed product and intended placement across truck brands; they do not establish comfort, long-term air retention, or exact fit for every listed make and model.

Official Havnby truck-bed placement image showing the built-in control panel; per-brand clearance is not documented.

Official Havnby lifestyle photo demonstrating the diagonal sleeping layout inside a built-out bed platform; the interior shown is a conversion build, not a bare truck bed.

Official Havnby product photo of the included storage bag in a truck bed; packed weight and third stored dimension are documented separately in this review's spec table.

## Decision summary

CloudCore Diagonal is Havnby’s diagonal-layout truck-bed mattress for one sleeper, sold under a single SKU across 22 make-and-model combinations spanning Ford, Chevrolet, GMC, RAM, Toyota, Nissan and Tesla. The fitment selector spans more brands than either HEST or Luno publishes for a truck-bed mattress, and the $169 sale price is below both competitors’ published starting prices.

This is a secondary-research review based only on Havnby’s official product page, Havnby’s warranty and return terms, and the published HEST and Luno truck-bed mattress pages, all checked on **24 August 2026**. No hands-on fit, comfort, noise, pressure-retention or setup test was performed for this assessment. Dimensions, timings, capacity and material descriptions below are seller-published figures, not independent measurements.

At the source check, all 22 listed vehicle combinations carried the same $169 sale price against the same $299 listed regular price. This page covers the full seven-brand fitment list. Readers who want the Tesla-only breakdown, including its separate evidence gaps, should read [this site’s dedicated Cybertruck review](/reviews/havnby-cloudcore-diagonal-cybertruck).

## Fitment across seven truck brands

Havnby’s product page lists 22 make-and-model combinations across seven brands. This is the full published list, reproduced here because neither HEST nor Luno maps this many brands on one page, and neither lists a Tesla fitment at all.

| Make | Model | Note |
| --- | --- | --- |
| Ford | F-150 |  |
| Ford | F-150 Lightning |  |
| Ford | F-250 Super Duty |  |
| Ford | F-350 Super Duty |  |
| Chevrolet | Silverado 1500 |  |
| Chevrolet | Silverado EV |  |
| Chevrolet | Silverado 2500HD |  |
| Chevrolet | Silverado 3500HD |  |
| GMC | Sierra 1500 |  |
| GMC | Sierra EV |  |
| GMC | Hummer EV Pickup |  |
| GMC | Sierra 2500HD |  |
| GMC | Sierra 3500HD |  |
| RAM | 1500 |  |
| RAM | 2500 |  |
| RAM | 3500 |  |
| Toyota | Tundra |  |
| Toyota | Titan | Titan is a Nissan nameplate elsewhere in Havnby’s own catalog; this combination does not match a real Toyota model |
| Nissan | Tundra | Tundra is a Toyota nameplate elsewhere in Havnby’s own catalog; this combination does not match a real Nissan model |
| Nissan | Titan |  |
| Nissan | Cybertruck | Cybertruck is a Tesla vehicle; this combination does not match a real Nissan model |
| Tesla | Cybertruck |  |
Every one of the 22 combinations carries the same $169 sale price, the same $299 listed regular price and the same seller SKU (02CC-PT-4FSB). Selecting a make and model changes the label on the listing. It does not change the physical product size that Havnby publishes.

## Official specifications

These figures come from Havnby’s official product listing and apply to every one of the 22 vehicle combinations, since they share one SKU.

| Specification | Official Havnby record checked 24 August 2026 |
| --- | --- |
| Observed price and status | $169 sale; $299 listed regular; all 22 combinations available on 24 August 2026 |
| Vehicle fitment | 7 makes, 19 named models, 22 listed combinations; 3 combinations do not match real vehicle nameplates |
| Shared SKU | 02CC-PT-4FSB, common to every listed vehicle option |
| Size | 79.1 × 31 × 4 in / 2010 × 800 × 100 mm, one size for every listed vehicle |
| Weight | 6.7 lb / 3.04 kg |
| Storage size | 28.3 × 13.4 in / 720 × 340 mm; third dimension not listed |
| Pump | Feature copy says built-in; included-items list says Compress pump × 1 |
| Inflation / deflation time | 35 seconds inflate; 50 seconds deflate, per the live product page checked 24 August 2026 |
| Maximum load | 660 lb, per the live product page checked 24 August 2026 |
| R-value | Not published |
| Material | Baby-safe TPU and seller-described high-quality foam |
| Included | Mattress, sheet, bag, compress pump, manual and eye mask |
## How the diagonal layout is meant to work

Havnby describes CloudCore Diagonal as a solo-sleeper mattress for short-bed pickups. The stated purpose is to use the bed’s longer diagonal measurement to create a longer sleeping surface than a straight, side-to-side layout allows, while leaving space beside the mattress for gear.

The listing describes adjustable air support combined with a four-inch foam core in a narrow 31-inch layout. Havnby positions this as a setup for one person after a work shift, an early fishing start, a hunting trip or a long drive, not as a two-person sleeping surface.

Havnby does not publish a bed-length figure for any of the seven brands. Buyers cannot confirm from the listing alone whether the 79.1-inch diagonal length fits a short bed, a long bed, or both equally well on a given brand and model.

## How CloudCore Diagonal compares to HEST and Luno

HEST and Luno are the two vendor pages that rank for general truck-bed mattress searches. Both are seller-authored product pages, not independent editorial reviews, so the figures below are attributed seller claims rather than test results, in the same way the Havnby figures above are seller claims.

| Metric | Havnby CloudCore Diagonal | HEST truck-bed mattresses | Luno Air Truck Bed Mattress |
| --- | --- | --- | --- |
| Starting price | $169 sale ($299 listed regular) | From $279 (Foamy); Dually from $529; Dually Extend from $249, stated by HEST | $299.99, marked down from $349.99, stated by Luno |
| Sizing approach | One size across all 22 listed combinations | Four size classes mapped to specific trucks: 25×64 in (Short), 25×78 in (Regular), 30×78 in (Wide), plus Dually variants, stated by HEST | Two fitment classes (mid-size 5 ft/6 ft; full-size 5.5 ft/6.5 ft); 13-14 lb packed weight and 4 in inflated height, stated by Luno |
| R-value | Not published | R-8.8, stated by HEST | Not published, per Luno’s own listing |
| Tesla / Cybertruck fitment | Listed (Tesla → Cybertruck, plus a mismatched Nissan → Cybertruck entry) | Not listed | Not listed |
| Warranty | 3-year limited, for purchases from 1 June 2026 | 5-year, stated by HEST | 3-year, with a paid lifetime option, stated by Luno |
| Return/guarantee | 60-day sleep trial; customer pays return shipping on non-quality returns; $15-$30 condition fees | 100-day money-back guarantee, stated by HEST | Not captured in the sourced Luno material for this comparison |
| Setup | 35 seconds inflate, 50 seconds deflate, per Havnby’s live product page | No-inflation setup, stated at 10 seconds by HEST | Pump included; setup stated at 3 minutes by Luno |
| Material | Baby-safe TPU shell with a foam-and-air core | Two-layer memory foam, stated by HEST | 300D Oxford fabric, dual-chamber air, 300 lb per side, stated by Luno |
| Included accessories | Sheet, storage bag, compress pump, manual, eye mask | Not detailed in the sourced HEST material for this comparison | Pump, Tailgate Buddies, storage sack and patch kit, with a 13-14 lb packed weight, stated by Luno |
The comparison favors Havnby on published starting price and on brand count, since neither HEST nor Luno lists a Tesla fitment. HEST also backs its listing with a 100-day money-back guarantee, longer than Havnby’s 60-day sleep trial, and Luno bundles a pump, Tailgate Buddies, a storage sack and a patch kit at a 13-14 lb packed weight. HEST publishes an R-value and a longer warranty that Havnby does not match. Havnby’s published 660 lb weight limit is a whole-mattress figure, not the per-side rating Luno publishes, so the two are not directly comparable. Neither competitor page discloses a discount code.

## What the official evidence supports

The catalog snapshot checked 24 August 2026 supports a clear mattress size, a low observed sale price, product weight, included accessories and a wider published brand count than either HEST or Luno lists.

- 22 published make-and-model combinations across seven brands, including Tesla
- Documented starting price of $169 sale, below HEST’s from-$279 and Luno’s $299.99
- Published 79.1-inch diagonal sleeping length with a narrow 31-inch width that leaves gear space beside the mattress
- Custom sheet, storage bag, compress pump, manual and eye mask listed as included
- Published 660 lb weight limit, 35-second inflate time and 50-second deflate time on the live product page

## What remains unknown or inconsistent

A trustworthy purchase decision also needs to see what the catalog does not answer. The current Havnby material leaves these gaps open:

- Havnby does not publish per-brand or per-model bed-length compatibility, so the single 79.1-inch size is not confirmed against every listed truck bed
- Three of the 22 catalog combinations (Toyota / Titan, Nissan / Tundra, Nissan / Cybertruck) do not match real vehicle nameplates
- Feature copy states the pump is built in, while the included-items list names a separate compress pump, an unresolved conflict
- Havnby does not publish an R-value, unlike HEST’s published R-8.8; Havnby’s published 660 lb weight limit is a whole-mattress figure, not the per-side rating Luno publishes

### Documented strengths

- 22 published make-and-model combinations across seven brands, including Tesla
- Documented starting price of $169 sale, below HEST’s from-$279 and Luno’s $299.99
- Published 79.1-inch diagonal sleeping length with a narrow 31-inch width that leaves gear space beside the mattress
- Custom sheet, storage bag, compress pump, manual and eye mask listed as included
- Published 660 lb weight limit, 35-second inflate time and 50-second deflate time on the live product page

### Concrete tradeoffs

- All 22 vehicle combinations share one generic SKU, so the fitment selector does not resize the mattress by brand or model
- Three catalog combinations do not match real vehicle nameplates
- Built-in pump copy conflicts with a separate compress-pump entry in the included-items list
- No R-value is published, unlike HEST’s published R-8.8 rating; the published 660 lb weight limit is a whole-mattress figure, not a per-side rating

## Ownership terms, care and storage

Havnby’s published warranty terms state that eligible purchases made on or after 1 June 2026 receive a three-year limited warranty for manufacturing and quality-related defects under normal use. Punctures, cuts, misuse, normal wear, unauthorized changes and second-hand purchases are excluded. That is a limited defect warranty, not a promise about comfort or vehicle-specific fit.

Havnby’s return terms describe a 60-day sleep trial from delivery. For a non-quality return, the customer pays return shipping, and original shipping charges are not refunded. The policy also lists possible condition fees of $15 for an opened, clean item and $30 when visible staining, soiling or cleaning is required. These terms should be checked again before ordering, since they apply to the mattress itself, not to the truck-bed fit.

A custom-fit sheet ships with the mattress, but Havnby does not publish wash settings, foam-care instructions, TPU-cleaner guidance or a puncture-repair procedure for this SKU.

## Who should consider it?

Consider it for one sleeper who wants a long diagonal surface and gear space in a short-bed pickup, across any of the seven listed brands, provided the generic vehicle selector and the unresolved pump description are acceptable.

## Who should not buy it?

Skip it for two sleepers, a confirmed per-truck bed-length fit, or a vehicle-specific dimension check before ordering; the published 660 lb weight limit is a whole-mattress figure, not a per-brand rating. Tesla Cybertruck owners who want that fit examined on its own should read the [Havnby CloudCore Diagonal Cybertruck review](/reviews/havnby-cloudcore-diagonal-cybertruck). Buyers who want a rear-seat option instead of a bed mattress should read the [Havnby SnugNest Truck Foam review](/reviews/havnby-snugnest-truck-foam).

## FAQ

### Does CloudCore Diagonal fit trucks other than the Tesla Cybertruck?

Yes. The catalog lists 22 make-and-model combinations across Ford, Chevrolet, GMC, RAM, Toyota, Nissan and Tesla.

### Does the mattress change size between truck brands?

No. All 22 listed combinations share one 79.1 × 31 × 4 in size and one seller SKU. The vehicle selector changes the label, not the physical product.

### How does CloudCore Diagonal compare to HEST and Luno truck-bed mattresses?

Havnby’s $169 sale price is below HEST’s from-$279 and Luno’s $299.99. HEST publishes an R-8.8 rating and a five-year warranty that Havnby does not match. Neither HEST nor Luno lists a Tesla fitment.

### Is there a version built specifically for the Tesla Cybertruck?

The same SKU includes a Tesla → Cybertruck selection. This site’s dedicated [Cybertruck review](/reviews/havnby-cloudcore-diagonal-cybertruck) examines that fit and its evidence gaps in more depth.

## Bottom line

CloudCore Diagonal publishes a wide seven-brand fitment list and a low observed starting price, but the shared SKU, the three mismatched vehicle combinations and the pump description conflict leave several fit-and-setup questions open.

Source facts were checked against the [official Havnby product listing](https://havnby.com/products/cloudcore-diagonal-mattress-for-truck), the [current warranty policy](https://havnby.com/pages/warranty), the [current return policy](https://havnby.com/pages/returns-policy), the [HEST truck-bed mattress collection](https://hest.com/collections/truck-bed-mattresses) and the [Luno Air Truck Bed Mattress listing](https://lunolife.com/products/air-truck-bed-mattress) on 24 August 2026. Unpublished specifications remain unpublished here; seller claims are not converted into test results, scores or owner-sentiment percentages.

Relevant next steps

## Compare before you buy

[Documented alternative **Havnby CloudCore Diagonal Cybertruck** covers the Tesla-specific fit, pump conflict and evidence gaps for this same SKU in more depth](/reviews/havnby-cloudcore-diagonal-cybertruck) · [Documented alternative **Havnby SnugNest Truck Foam** reviews Havnby’s back-seat foam-top pad, a rear-seat alternative to a bed mattress for full-size trucks](/reviews/havnby-snugnest-truck-foam) · [Cab alternative **Havnby SnugNest Mid-Size Truck Pad** the back-seat option when the bed is loaded, with all 25 fitment variants listed](/reviews/havnby-snugnest-midsize-truck)

Researched by Fredrik Mastouri · current specifications checked against the linked manufacturer sources; owner-feedback claims are attributed where used. Methodology: [how we review Tesla mattresses](/methodology). Page revised 2026-08-25; live prices, stock and terms can change. See our [Affiliate disclosure](/disclosure).

Page last revised: August 25, 2026