Abstract: An exercise mat consisting of laminated outer and core layers of closed-cell plastic foam having different selected densities. A relatively thick central layer is so configured that air chambers are formed bounded by it and one or both of the outer layers. These chambers may be constituted of air cylinders passing vertically through the central layer or of horizontal slots formed on a surface or surfaces of the central layer. The air chambers can be of any suitable predetermined size and spacing. The mat may be configured to permit folding by maintaining one of the outer layers continuous to form a hinge at a point or points where the core layer and other outer layers are discontinuous.

Abstract: A thermal insulation system for electrical outlets installed against the outside walls of buildings. A large plate of special thermal insulation is secured behind the faceplate of the outlet. Other smaller plates of thermal insulation are placed over the receptacles of the electrical outlets. Dummy plugs are used to seal the slots of the receptacles and hold the small insulation plates in position.