Source-linked specifications for the EXPED MegaMat Ultra — LXW. This is a detailed camping mattresses record, checked on 2026-10-30; price and live stock are not verified.
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What the specs mean
The listed R-value is 4.4. Check its stated test method: ASTM F3340 values are useful for comparing insulation under controlled conditions, not a guaranteed temperature limit. Thickness describes cushioning and cannot substitute for R-value. This version is listed at 30.3 in (77 cm) wide; compare that with the tent's narrowest usable floor width.
Read the exact variant
LXW is the recorded option. Other sizes or revisions may have different dimensions, weight, or test labels.
Reported specifications
Unit conversions are calculated from the source value. Open the source tag for the originally published number.
| Specification | Manufacturer or retailer value |
|---|---|
| Manufacturer R-value | 4.4 [pad-src-032] |
| R-value test method | ASTM F3340; product-specific edition unspecified [pad-src-086] |
| Construction | air [pad-src-032] |
| Length | 77.6 in [pad-src-032] |
| Width | 30.3 in [pad-src-032] |
| Thickness | 4 in [pad-src-032] |
| Weight | 43.5 oz [pad-src-032] |
| Packed length | 12.2 in [pad-src-032] |
| Packed diameter | 6.3 in [pad-src-032] |
| Top fabric | recycled 50D tricot polyester with TPU film [pad-src-032] |
| Bottom fabric | recycled 75D polyester with TPU film [pad-src-032] |
| Insulation | Texpedloft microfiber [pad-src-032] |
| Pump included | Yes [pad-src-032] |
| Compatible pump | Schnozzel pumpbag/stuff sack [pad-src-032] |
A blank or unverified value means the dataset cannot support a number; it does not mean zero. Each source tag opens the record used for that field.
Check a current Amazon search
Search for EXPED MegaMat Ultra and check the exact size, revision and seller details before ordering.
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Compare a size against its own record. Shared family names do not prove identical weight or dimensions.
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Verification limits
Evidence basis: manufacturer_declared. US market: confirmed. Listing status: listed. These labels do not establish current stock.
Unverified fields: packed_weight_g
- ASTM method supported by manufacturer product text and/or brand testing policy; no individual laboratory certificate collected.
Where these facts came from
- MegaMat Ultra — Exped, accessed 2026-10-30 [pad-src-032]
- Sleeping Mat Know How - R-Value — Exped, accessed 2026-10-30 [pad-src-086]
We link to a seller or manufacturer for verification and do not handle purchases, delivery, or returns. Check current terms and the exact SKU with that seller.
Questions to ask before buying
Is the listed price current?
No price or live stock data is included. Use the official product link for the current listing.
Does a nominal capacity or temperature label guarantee fit or warmth?
No. Compare exact dimensions and tested values where available, then allow for real-world conditions.
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