What Our Gearhead(R) Experts Are Saying:"The MegaMat Duo is the pad I point people to when they're done compromising on sleep at camp. Four inches of self-inflating foam is a genuine game-changer, and the 3D sidewalls mean the sleeping surface actually goes edge to edge - no rolling off in the night. The R-value of 8. 1 makes it legitimate cold-weather gear, not just a car-camping luxury. The Top-Up Pump is a small detail that makes a real difference when you want to dial in firmness after it self-inflates."A bad night's sleep poisons everything that comes after it. Exped's MegaMat Duo starts with four inches of open-cell foam and builds from there - 3D vertical sidewalls that extend the sleeping surface all the way to the edges, a recycled stretch polyester top that's quiet and soft against skin, and an R-value of 8. 1 that makes it useful well below freezing. It self-inflates, and the included Top-Up Pump lets you fine-tune firmness once it's done. The oversized deflate valve collapses it fast when it's time to pack. Welded side handles make moving it easy, and the SideWinder stuff sack keeps it contained for transport. Whether it's living in the back of a van or rolling out in a base camp tent, the MegaMat Duo removes sleep from the list of things to manage on a trip.