Are you always on the lookout for something bigger and better? Simply put, the MondoKing™ 3D XXL 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. Stuff sack included.

• Stable Comfort: 4 in. of stabilized loft provides the comfort of home anywhere.
• Updated Fabric: Supple stretch-knit fabric provides deluxe breathability and plush surface.
• Giant Sleep Surface: Vertical sidewalls maximize useable sleep surface.
• Incredibly Warm: Foam core delivers all-season warmth to assure a great night's rest anytime.
• Self-Inflating: Dual valves allow compressible foam core to expand/inflate when unpacked; just a few breaths top it off to your ideal firmness.
• Mateable: Mates perfectly with other 3D mattresses.
• R-Value: 11.4
• Weight: 6 lbs 12 oz.
• Width: 30 in.
• Length: 80 in.
• Thickness: 4 in.
• Top fabric type: 50D polyester knit
• Bottom fabric type: 50d Polyester50
• Foam type: Urethane Foam