I bought these cushions (one 2pk and one single) to use at our son's military basic training graduation. The two days of events involved sitting on concrete bleachers for about 5 hours one day, and metal bleachers for about the same time on the next day. I wanted something comfortable to sit on, but easy to carry, as we would have a lot of walking to do. When not inflated, you can stuff these in your pocket. They take a couple of quick puffs to blow up, and the fill valve has a good check valve in it to keep it inflated. When deflating, you just pop the deflate valve and roll up the cushion and it gets all the air out.
Honestly, these are way more comfortable to sit on than any foam cushion or stadium seat that I've ever used in the past. I'll be spending whole days in high school gyms this winter, and I will definitely be taking this cushion over our big stadium seats. I'm a bigger person at about 230lbs, so I was a little worried about if they would deflate, or be comfortable for long periods, and let me tell you, they're fantastic! I highly recommend picking some up if you have to sit on bleachers or other uncomfortable seats.