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.
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. Buyers who want a rear-seat option instead of a bed mattress should read the Havnby SnugNest Truck Foam review.
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 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, the current warranty policy, the current return policy, the HEST truck-bed mattress collection and the Luno Air Truck Bed Mattress listing on 24 August 2026. Unpublished specifications remain unpublished here; seller claims are not converted into test results, scores or owner-sentiment percentages.