Sea to Summit Camp Self-Inflating Sleeping Mat

The Sea to Summit Camp Self-Inflating Sleeping Mat is the thinner, slightly lighter sibling to the Camp Plus, offering a nearly comparable R-value of 4.2 (ASTM F3340-18) at just 4 cm of thickness, aimed at three-season use. The open-cell polyurethane foam core does most of the inflating work once the valve opens. Body-mapped Air Zone construction varies foam firmness across load-bearing areas of the body, similar to the Plus model but in a slimmer profile that packs down more compactly — 15 × 30 cm packed versus the bulkier thicker version. The Regular size (183 × 56 cm) weighs 840 g, and a ratio of roughly 200 g per unit of R-value is a comparatively good figure within the self-inflating mat category. Woven 75D recycled polyester with TPU lamination on both top and bottom resists punctures, an XPEL valve speeds up deflation, and a stuff sack is included. A quieter surface and no need to blow it up by mouth make it a balanced choice between comfort and packability for trips outside deep winter.