Sea to summit ether light xt lnsulated large sleeping pad - Sea to Summit Ether Light XT Rectangular Insulated Sleeping Mat

I'm 6'-2" and 210 pounds, so I got the large. Large measures 77" long, 25" wide, 3-1/2" thick as inflated. Supposed to be 4" thick. Rated at R=3.2 for about 25 degrees F limit. Comfortable. The blow-up bag (doubles as the carry sack) takes a second to figure out. The sleeping pad comes out of one end of the sack, and the other end of the sack has the nozzle that you plug into the inflation opening in the pad. The inflation opening is over the same opening as deflation, but you only open one "door" to inflate. Another "door" below the inflation opening, deflates the pad. It's easy once you figure it out, but it confused me at first. This not a cold weather pad, it's a light summer pad. I tried it at 40 degrees F and it was OK. Not sure I would go below freezing. At 1.6 pounds this is a good light backpacking pad. I've only used it a couple of times, but no leaks yet.