MegaMat is our original, most comfortable, best-reviewed sleeping mat, making truly luxurious sleep a reality for thousands of car campers and overland enthusiasts everywhere since 2011. Mega in size, comfort, and warmth, the MegaMat Duo 10 has at its core 4-inches (10 cm) of just-the-right density open-cell polyurethane foam for exceptional support. Horizontal air channels within the foam help reduce weight and packing size without sacrificing comfort. The unique 3D construction offers the largest possible sleeping area. To enhance the cradling effect, the mat’s surface features a soft stretch tricot polyester that relieves pressure points (hips and shoulders) while ensuring a delightful feel against the skin. The MegaMat is designed to self-inflate. Using the included EXPED Mini Pump, you can effortlessly achieve your desired level of firmness. The two flat valves make both inflation and deflation quick and easy. We also provide our convenient Sidewinder Bag for hassle-free packing.   Features Proven field performance 4" of Oeko-Tex 100 certified, open-cell polyurethane foam for support and warmth Stretch tricot surface for maximum comfort Air-core-channeled foam insulation reduces weight, bulk Separate inflation/deflation FlatValves, extra-large deflation valve 3-D vertical sidewalls for maximum sleeping surface Mini Pump for top-off inflation Sold with easy-to-pack SideWinder™ stuff sack Durable construction Product contents: Mat, Mini Pump, Sidewinder Stuff Sack, Repair kit Specifications R-Value 8.1 Temperature -40 °F DimensionsM: 72 x 41 x 4 inLW+: 77.6 x 52 x 4 in Queen: 80 x 59.8 x 4 in WeightM: 117.8 ozLW+: 163.3 oz Queen: 193.8 oz Packed DimensionsM: 22 x 11 inLW+: 27.6 x 11.8 in Queen: 31.5 x 11.8 in Pump Style Self inflation/Mini Pump   Materials Top50 D polyester, TPU polyether film laminate, hydrolysis resistant, honeycomb embossed, OEKO-TEX® 100 certified dyeing, DWR free Bottom75 D polyester, TPU polyether film laminate, hydrolysis resistant, OEKO-TEX® 100 certified, DWR free Insulation16 kg/m³ open-cell PU foam, OEKO-TEX® 100 tested Vehicle Fit Guide MegaMat Duo Medium Fits many mid-size trucks, compact and mid-size SUV's and wagons. MegaMat Duo LW+ Fits many full-size trucks, passenger vans and SUV's.