Every once in a while I find a gear item that is actually life altering, and it's usually a small, unassuming item. After 20 years of blowing up thermarests, it has definitely gotten a little old. This little mini pump has definitely changed my life, and I don't want to be without it ever again! It's really small, so I won't have to. While setting up the tent (or reorganizing the car, depending on where you're bivying), just lay out the thermarests (I generally have to do 2, which is way too much) and get the pump going. I usually finish them off with a few breaths to get them really firm, and can't believe how easy it is compared to how not easy it used to be... I often drop the pump and make the lid fall off, but it goes back on well fortunately (it doesn't break when it falls off, just pops off the small tabs it sits on). I keep it in the stuff bag of one of the thermarests so I don't forget it. If you use thermarests, you should buy this thing immediately.