"What Our Gearhead® Experts Are Saying:""I love this pad for spring and fall backpacking trips when temps dip low at night. It’s super packable, adds solid insulation with its 3. 6 R-value, and the nonslip base keeps it in place even on sloped ground.""We know how much comfort matters when the temps drop, and the Mountain Equipment Helium 3. 8 Warmzone Mat delivers just that without tipping the scales. Designed to bring insulation and ease to cool-weather nights in the backcountry, this pad offers a thoughtful balance between weight savings and warmth. The 1. 5-inch thickness and bilateral-cored foam add just enough cushion without the bulk, while the durable 75D fabric stands up to season after season of use. With an R-value of 3. 6, it insulates well for shoulder-season trips, and the push-in valve makes setup fast after long days on trail. A reinforced, grippy bottom keeps the pad steady, and the included stuff sack makes for quick stowing when it's time to move out."