Suitable for backpack adventurers who pay attention to every gram of weight, or for car campers seeking a bit of extra luxury on the go. The self-inflating mats provide consistent warmth across their entire length. All in a compact, comfortable, and easy-to-use system. In the lighter models, Sea to Summit has managed to reduce the weight and bulk of the PU foam by 20% using the vertical Delta Coring method. For optimal placement of the Delta Cores, they utilize extensive mapping techniques to analyze the pressure zones of the sleeping mats. In the more heavily used areas at the shoulders, hips, and feet, the Delta Cores are smaller to ensure a higher level of warmth and comfort. In less stressed areas, more foam is cut out to minimize weight and pack size. The Delta Core-V technology is applied in the Ultralight SI and Camp Mat SI models. Multifunctional valve. Made from robust, durable 75D polyester with laminated TPU. Smaller vertical Delta Core-V cutouts at body contact points such as shoulders, hips, and feet provide optimal warmth. Larger vertical Delta Core-V cutouts in less stressed areas reduce weight and pack size. Category: Air mattress. Features: self-inflating. Outer material: 100% polyester. Outer coating: TPU. Length: 183 cm. Width: 64 cm. Thickness: 38 mm. Mattress thickness: standard. Weight: 1115 g. Packed size: 20.5 x 34 cm. Type: extra wide. Design: air mattress. Self-inflating. R-value: 4.