I bought this, very excited about the new improvements to the Therm-a-rest product. Unfortunately, it did not come through. Every night, this pad deflated slightly, leaving me sleeping on a less than firm pad, so I could really feel the hard ground under me. My buddies right next to me, with their old Therm-a-rests, stayed good and inflated throughout the night. I blew it up good and screwed the cap on super tight, but the same problem happened multiple nights in a row on a Rainer trip. Maybe I just got a bad pad. I'm sending it back to the manufacturer, because my 10-year-old pad works better!