Decision summary
CloudCore Diagonal is Havnby’s narrow truck-bed option for one sleeper and gear, but the Cybertruck variant shares a generic SKU, the fit copy omits Cybertruck, and the pump description contradicts the contents list.
This is a secondary-research review based only on Havnby’s official product page, official product data, warranty terms and return terms checked on 19 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, the Tesla → Cybertruck variant was available at a $169 sale price against a listed $299 regular price. The product feed records a publication date of 25 September 2025. The price is a dated observation, not a promise of today’s total; confirm the exact vehicle option and final amount before paying.
Exact Tesla fit and product identity
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 vehicle choices share one seller SKU. The official feed also contains malformed make/model combinations involving non-Tesla vehicles, reducing confidence in the variant taxonomy.
| Specification | Official Havnby record checked 19 August 2026 |
|---|---|
| Observed price and status | $169 observed on 19 August 2026; the seller displayed $299 as the regular reference price. No code is included. |
| Tesla fit | Tesla → Cybertruck selector; no year choice |
| Size | 79.1 × 31 × 4 in / 2010 × 800 × 100 mm |
| 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; contents list says Compress pump × 1 |
| Inflation / deflation time | Not published |
| Maximum load | Not published |
| Material | Baby-safe TPU and seller-described high-quality foam |
| Included | Mattress, sheet, bag, compress pump, manual and eye mask |
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.
A feature section says the pump is built into the mattress, while the package list includes a separate “Compress pump.” No setup times, pressure, power source or battery details are provided.
The mattress is listed at 3.04 kg and a two-dimensional 72 × 34 cm stored size. Havnby does not provide the third dimension or clarify whether the pump is internal or separately packed.
What the official evidence supports
The seller provides a clear 201 × 80 × 10 cm mattress size, low observed sale price, product weight and included accessories. The Cybertruck-specific fit and pump system are less reliable.
The official record supports the following practical strengths:
- Active Tesla → Cybertruck selection
- Published 201 cm diagonal sleeping length
- Narrow 80 cm width leaves adjacent gear space
- Custom sheet, bag, pump and eye mask listed
- Observed sale price below the other Havnby Cybertruck products
What remains unknown or internally inconsistent
A trustworthy decision also requires the missing data to remain visible. The current Havnby material does not close these gaps:
- Havnby does not publish Cybertruck-specific bed placement and clearance
- Havnby does not publish whether the pump is built in or separately packed
- Havnby does not publish inflation time, deflation time, pressure and power source
- Havnby does not publish maximum supported weight and complete packed volume
The pump cannot simultaneously be confidently described as integrated and separate without clarification. The malformed vehicle variants also mean the selector alone is weaker evidence than a Cybertruck-specific dimension table.
Documented strengths
- Active Tesla → Cybertruck selection
- Published 201 cm diagonal sleeping length
- Narrow 80 cm width leaves adjacent gear space
- Custom sheet, bag, pump and eye mask listed
- Observed sale price below the other Havnby Cybertruck products
Concrete tradeoffs
- All truck choices share one generic SKU and the feed has malformed vehicle combinations
- 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 setup timing is published
Ownership terms, care and storage
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. That is a limited defect warranty, not a promise about personal 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. The current policy also lists possible condition fees of $15 for an opened clean item and $30 when visible staining, soiling or cleaning is required. Those terms should be checked again before ordering.
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.
Who should consider it?
Consider it for one sleeper who wants a narrow, long truck-bed surface and space for equipment, provided generic Cybertruck fit and the unresolved pump description are acceptable.
Who should not buy it?
Skip it for two sleepers, rear-seat use, a confirmed vehicle-specific Cybertruck bed profile, or when load capacity and setup hardware must be known before ordering.
The nearest in-site alternatives are:
- Havnby SnugNest Cybertruck — uses the rear seat and has a dedicated Cybertruck SKU
- Havnby SnugNest Truck Foam — offers a generic Cybertruck rear-seat selection rather than a bed mattress
- Tesla Cybertruck Air Mattress — covers the full truck bed through Tesla’s official accessory line
FAQ
Does CloudCore Diagonal have a Cybertruck option?
Yes. Tesla → Cybertruck is an active selector choice, but the main fit text omits Cybertruck.
How long is the sleeping surface?
Havnby lists 79.1 inches / 201 cm.
Is the pump built in?
The page is contradictory: feature copy says built-in, while the contents list includes a compress pump.
What is the load limit?
Havnby does not publish one on the current listing.
Bottom line
CloudCore Diagonal has a useful published solo footprint and attractive dated price, but the generic variant data, missing Cybertruck measurements and pump contradiction prevent a stronger fit conclusion.
Source facts were checked against the official Havnby product listing, the current warranty policy and the current return policy on 19 August 2026. Unpublished specifications remain unpublished here; seller claims are not converted into test results, scores or owner-sentiment percentages.