Therm-a-Rest MondoKing 3D Sleeping Mat - Large & XX Large For the ultimate in camping comfort, the MondoKind 3D sleeping mat from Therm-a-Rest is like sleeping in your own bed! StrataCore™ Construction: Yielding an impressive warmth-to-weight ratio, StrataCore uses a continuous layer of thermal foam nestled between alternating ridges of air and foam.
