Independent editorial review

Havnby CloudCore Diagonal Cybertruck Review

A 201 × 80 × 10 cm foam-and-air mattress for one person lying diagonally in a pickup bed, sold with a Cybertruck selector. $139 on sale on 29 September 2026. Generic fit; the pump description conflicts.

By Fredrik MastouriUpdated 8 Oct 2026

Manufacturer evidence

Official CloudCore Diagonal Cybertruck product views

These three images come from Havnby’s product gallery.

Havnby CloudCore Diagonal truck mattress (generic fit) in a studio view
Havnby studio view of the CloudCore Diagonal.
Havnby CloudCore Diagonal mattress laid diagonally across a pickup bed, seen from above
Manufacturer product view showing the narrow diagonal format.
Havnby CloudCore Diagonal mattress laid diagonally in a short pickup bed, with on-image marketing text about short truck beds
Havnby image of the mattress in a short truck bed.

Verdict

The Havnby CloudCore Diagonal is a low-cost bed for one person lying diagonally in the Cybertruck bed, with room for gear beside it.

It is 201 × 80 × 10 cm and 3.04 kg.

The Tesla → Cybertruck variant cost $139 on sale against a $299 regular price on 29 September 2026 ($169 on 19 August 2026), and the code AWD took 10% off in a cart test on 12 September 2026; we earn a commission if you use it.

It is a generic truck mattress: one SKU covers 19 trucks, the fit text does not name the Cybertruck and the page contradicts itself on the pump.

Good value for one sleeper in the truck bed. Confirm the pump and the Cybertruck fit with Havnby before ordering.

Who it is for

  • One sleeper who wants a long, narrow surface in the Cybertruck bed with gear beside it
  • Buyers who want the lowest-priced Havnby truck-bed option
  • Anyone taller than the 71-inch Tesla Cybertruck mattress allows

Who should skip it

  • Two sleepers: it is 80 cm wide
  • Anyone who wants a Cybertruck-specific shape: one generic SKU covers 19 trucks
  • Buyers who need a load rating or a clear answer on the pump before ordering
201 × 80 cmSize
10 cmHeight
3.04 kgWeight

Seller-published figures.

Key specs

Seller figures, checked 29 Sep 2026. Official Havnby record checked 29 September 2026
SpecificationRecord
Price$139Havnby US store; sale price against $299 listed regular price · 29 Sep 2026$169Havnby US store, Tesla > Cybertruck choice; sale price · 19 Aug 2026
FitsCybertruckThe Tesla > Cybertruck choice uses one generic truck SKU shared by 19 vehicle choices. The main fit copy does not name Cybertruck. Havnby gives no Cybertruck bed placement or clearance.
Size201 × 80 cm79.1 × 31 × 4 in / 2010 × 800 × 100 mm
Height10 cm
Weight3.04 kg
PumpFeature copy says built-in; contents list says Compress pump × 1; 35 s inflate, deflate time not published
Storage size28.3 × 13.4 in / 720 × 340 mm; third dimension not listed
Inflation / deflation time35 s inflate (Havnby page); deflate time not published
Maximum loadNot listed on 29 September 2026 (the 24 August 2026 page showed 660 lb)
MaterialBaby-safe TPU and seller-described high-quality foam
IncludedMattress, sheet, bag, compress pump, manual and eye mask

What the evidence can prove

Seller listing for live verification:

This is a research review: nobody on this site has slept on the CloudCore Diagonal. Havnby’s product page, product data, warranty and return terms were checked on 19 August 2026 and re-checked on 16 and 29 September 2026; price, availability and specifications were unchanged at the last check. The sale price fell from $169 to $139 between the August and September checks, against the same $299 regular price. The store’s review count can span vehicle variants, so we do not treat it as Tesla fit evidence.

Used

Seller documentation

Product page, specifications and store terms. Sources checked 29 Sep 2026.

Price record

Each price is a dated observation, not a promise of today’s total.
DateWhat we recordedPrice
29 Sep 2026Havnby US store; sale price against $299 listed regular price$139
16 Sep 2026Havnby US store; sale price against $299 listed regular price$139
19 Aug 2026Havnby US store, Tesla > Cybertruck choice; sale price$169

Checks before you buy

CloudCore Diagonal is a 201 × 80 × 10 cm foam-and-air mattress made to use a pickup bed’s diagonal length. Havnby publishes the size, weight, price and box contents; the Cybertruck fit and the pump are the weak points.

  1. Packing and cargo space

    The mattress is listed at 3.04 kg and a 72 × 34 cm stored size. Havnby publishes no third dimension and does not say whether the pump is inside the packed measurement.

  2. Fabric, foam and build quality

    Havnby describes adjustable air support with a four-inch foam core in a narrow 31-inch layout, so a short truck bed’s diagonal can be used with gear alongside. Foam density, the foam/air split, TPU grade and seam construction are not published.

  3. Pump, power and setup

    A feature section says the pump is built in, while the box contents list a separate “Compress pump”. Havnby lists a 35-second inflate time but no deflate time, pressure, power source or battery data.

  4. Sleep quality and support

    The 201 × 80 cm surface is designed for one person lying diagonally, with room for equipment beside it. No maximum load is listed (660 lb was shown on 24 August 2026), and Havnby publishes no Cybertruck bed placement, tailgate clearance, insulation or air retention.

  5. Cleaning, moisture and storage

    A custom-fit sheet is listed. Havnby publishes no wash settings, foam-care instructions or puncture-repair procedure, so follow the label or manual in the box.

Strengths and tradeoffs

Why we rate it

  • Tesla → Cybertruck choice on the selector
  • 201 cm diagonal length for one sleeper
  • Narrow 80 cm width leaves gear space alongside
  • Sheet, bag, pump and eye mask listed in the box
  • $139 on sale on 29 September 2026, the lowest-priced Havnby for the Cybertruck

Tradeoffs

  • All 19 truck choices share one generic SKU
  • Main fit copy does not name Cybertruck or publish Cybertruck-bed measurements
  • Built-in pump copy conflicts with a separate compress-pump contents entry
  • No load rating or deflate time is listed

Trial, warranty and care

Havnby’s current warranty page states 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, unauthorised changes and second-hand purchases are excluded. The warranty does not cover comfort or vehicle fit.

Havnby’s return page states a 60-day sleep trial from delivery. For a non-quality return, the customer pays return shipping and original shipping charges are not refunded. Havnby’s two policy pages disagree on the fee for opened returns: the returns page lists $15 (opened) or $30 (stained), and the refund policy lists $10 (light use) or $20 (visible wear); unopened items are $0 on both (checked 29 September 2026). Ask Havnby in writing which fee applies before you open the mattress.

A custom-fit sheet is listed, but Havnby does not publish wash settings, foam-care instructions, TPU cleaner guidance or a complete puncture-repair procedure.

Which Tesla does it fit?

The make/model selector includes Tesla → Cybertruck and metadata references Cybertruck 2024+. The general fit sentence names other non-Tesla trucks without naming Cybertruck.

All 19 truck choices share one seller SKU, so the selector says little about Cybertruck fit.

Havnby’s product data dates the listing to 25 September 2025.

Construction and setup

Havnby describes adjustable air support with a four-inch foam core in a narrow 31-inch layout. The purpose is to use a short truck bed’s longer diagonal while preserving gear space alongside.

Havnby lists a 35-second inflate time but no deflate time, pressure, power source or battery data.

The mattress is listed at 3.04 kg and a 72 × 34 cm stored size, with no third dimension.

Where the product page contradicts itself

A feature section says the pump is built into the mattress, while the box contents list a separate “Compress pump”. The main fit sentence names other trucks but not the Cybertruck. A maximum load of 660 lb was shown on 24 August 2026 but was gone by 29 September 2026. On 24 August 2026 the product data also held three malformed make/model combinations, including Nissan → Cybertruck; Havnby removed them by 16 September 2026.

Compare with alternatives

Documented alternative

Tesla Cybertruck Air Mattress

Covers the full truck bed through Tesla’s official accessory line

Price
$295Checked 16 Sep 2026
Our rating
82

FAQ

Will it fit my Cybertruck bed?

Havnby offers a Tesla → Cybertruck choice, but all 19 truck choices share one generic SKU and the main fit text does not name Cybertruck. Havnby publishes no Cybertruck bed placement or clearance. The mattress is designed to lie diagonally in a pickup bed for one sleeper, with gear alongside.

Is it long enough for someone 190 cm tall?

Havnby lists 201 × 80 × 10 cm (79.1 × 31 × 4 in) and 3.04 kg. It does not publish a sleeper height limit or how the diagonal length sits in a Cybertruck bed. No maximum load is listed on 29 September 2026; the 24 August 2026 page showed 660 lb.

Is the pump built in, and how long does inflation take?

The page contradicts itself: feature copy says the pump is built in, while the box contents list a separate compress pump. Havnby lists 35 seconds to inflate but no deflate time, power source or battery data.

What does it cost, and is there a discount code?

Havnby listed the Cybertruck variant at $139 on sale against a $299 regular price on 29 September 2026; it was $169 on 19 August 2026. The partner code AWD took 10% off this sale item in a cart test on 12 September 2026. We earn a commission if you buy through our links.

What are the return and warranty terms?

Havnby offers a 60-day sleep trial from delivery and a three-year limited warranty on purchases from 1 June 2026; the warranty excludes punctures, normal wear, comfort and vehicle fit. For a non-quality return you pay return shipping, and Havnby’s two policy pages list different fees for opened items, so ask in writing before you open it.

How does it compare with Tesla’s Cybertruck Air Mattress?

Tesla’s mattress covers the full truck bed at 71 × 49.9 × 5.9 in (180.3 × 126.7 cm), has an integrated 120V pump and was $295 on 16 September 2026. CloudCore Diagonal is longer and narrower at 201 × 80 cm, for one sleeper, and was $139 on sale on 29 September 2026.

Primary sources checked

  1. Official CloudCore Diagonal Cybertruck listinghavnby.com
  2. Havnby warranty termshavnby.com
  3. Havnby return and 60-day trial termshavnby.com

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. Page revised 8 Oct 2026; live prices, stock and terms can change. See our Affiliate disclosure.

Relevant next steps

Cybertruck guideTesla Cybertruck mattress guideBed or back seat: every Cybertruck mattress we cover, side by side.Best Tesla mattress for tall people: published length for each carGuideLightest Tesla mattress: published weight and packed size comparedGuide

Publisher: Tesla Mattress Guide Page last revised

Havnby CloudCore Diagonal Cybertruck · Brand code, checked 16 SepCode AWD

See code AWD Havnby CloudCore Diagonal Cybertruck