YMETECH Car Mattress - Portable SUV & Camping Mattress, Back Seat Extender, Folding Car BedCar Back Seat Extender Mattress The platform bridge has four sturdy rigid PP hard platforms that maximize backseat space while also preventing them from falling off the seat. It holds up to 90 pounds through 5 solid connector, extending around 14. 6 inch car back seat space. Non Inflatable Design YMETECH non inflatable car mattress do not need to be inflated. Easier and faster to use. No more worries about air leaks in the mattress. Foldable The