Thermarest mondoking 3d blue depths mattress description for big comfort and support on a massive scale the mondoking tm mattress offers 4 inches 10 cm of ultra responsive body contouring foam in a pad that maximizes space and comfort the fabric shell provides next to skin softness while the rugged bottom resists punctures wherever you camp offering long lasting support for years to come the mondoking tm mattress compresses to a surprisingly reasonable travel size and the high loft