Simply put, the MondoKing™ 3D is the biggest Therm-a-Rest® mattress ever. Vertical sidewalls create 20% more usable sleep surface so you have room to sleep like starfish. Dual valves allow compressible foam core to expand and inflate quickly when unpacked.
4 in (10 cm) of stabilized loft provides the comfort of home anywhere
Dual valves allow compressible foam core to expand/inflate when unpacked; just a few breaths top it off to your ideal firmness
Foam core delivers all-season warmth to assure a great night's rest anytime