1.Advanced Foam Technology: This memory foam sleeping pad with a density of 26D that conforms to your body better, built in pillow top while providing a firm, supportive foundation. Due to its thicker and higher foam density compared to others, it may have slightly larger dimensions and weight when stored. The sleeping pad measures 27' x 8' x 8' and has a weight of 8.1lbs after being stored. Please note not friendly for backpacking. 2.Upgraded 3.1' Ultra-thick Camping Pad: The ly upgraded camping mattress pad thick 3.1 inch, premium foam material superior comfort to ensure a restful night's sleep. It measures 77' x 27' x 3.1' after inflation, which hold up to 800lbs without air leakage or damage, designed for adults of all shapes. 3.Upgraded Valves for Fast Storage: To make camping sleeping pad storage easier, we designed a dual-use valve. Well, open the two layers for self-inflating when inflating. However, you need just open the first layer and be sure keep the second layer closed when deflating. In this state, the air only goes out but not in, so you can store the pad easier just by squeezing out the air. 4.Only 20s for Self-Inflating: Just open the 2 valves, the foam sleeping mats will self inflate in 20 Seconds, no mouth, no foot, no air pump needed. Tips: the mat you receive is vacuum packed, so it may inflate nearly 20 minutes in the first inflation.