Sea to Summit Ultralight Insulated Air Sleeping Mat

The Sea to Summit Ultralight Insulated Air Sleeping Mat adds Thermolite HL-1 insulation and an Exkin Platinum reflective layer to the Air Sprung Cell construction, bouncing body heat back toward the user. An ASTM R-value of 3.1 puts it in three-season territory — unlike the uninsulated version in the same lineup, it can handle cooler spring and autumn nights without needing an additional pad underneath. The Regular size weighs 480 g and packs down to 12.5 × 24 cm, with a pad thickness of 5.1 cm. Using a reflective foil layer instead of traditional foam fill keeps the weight lower than a foam-insulated pad with comparable R-value would achieve, though the reflective principle only works when the foil faces the body correctly. A pump sack and repair kit are included, which is close to mandatory for air pads — puncture risk remains the category's main weakness compared with self-inflating designs. For hikers planning trips outside the summer months, it's a reasonable balance between weight and thermal comfort.