A 3 season 7mm thick compact mat made from XPE foam. Chemically Cross-Linked Polyethylene Foam is an extremely fine-celled foam, ideal for projects and applications that require thicker foam. With a smooth, pleasant feel combined with superior physical and chemical properties, cross-linked polyethylene foam is the solution for an array of applications that demand thicker sections of closed cell foam. With its closed cell density, XLPE works well commercially as thermal insulation, construction expansion joints and industrial gaskets. It is also used as packaging and in flotation equipment, with its low moisture permeability and high buoyancy.