I have used this one time. I bought it last year on Amazon. Paid $139. Slept one night on the couch with it. It is soooooo comfy. I don't have a way to go camping so I'm selling it. I don't have a car now.

　　Here is what Amazon says:

　　77.5x26"

　　Self inflating mat that inflates quickly through wide air channels and valves

　　Flat Valve Technology features low profile valves for inflation and deflation are protected and durable

　　High frequency welded seams for durability and only CFK-free high grade open cell foam

　　Measures 76 inches long by 26 inches wide

　　Light, compact and affordable, the Exped SIM Comfort 7.5 Self Inflating Sleeping Pad brings Exped's innovation and quality to this more traditional mat design. The SIM, self inflating mat, is a 4 season sleeping pad that is surprisingly lightweight thanks to air cores in the foam.Size: 78 in. x 26 in..2.8" thick..Weight: 58.5 oz