http://www.eurekatentscanada.com/products/view/275?s=section_6
I have one of these and they stay inflated the whole camping trip and you do not feel a thing under you. I like them way better than those thick huge air mats. The big huge ones seem like they have to be inflated several times durring a trip. You move and you feel like you're going to fall off. Haven't been on a huge air mattress that I liked. Plus they are a bit much to carry with you and pretty heavy when you want to pack light.