The Infusion Seat is triple-layered designed for the ultimate in performance and comfort. A thermal barrier 3/8 inch layer of Softek closed-cell foam provides for maximum heat retention. A comfort barrier of 1 3/8 inches of premium, furniture-grade urethane Comfotek foam provides unmatched comfort. An earth barrier of 1 3/8 inch layer of rigid, closed-cell foam creates a barrier between the cold, wet ground and your backside. Plus, a waterproof polyurethane-coated outer fabric adds another layer of protection. This fabric is also freeze-proof so it won't get hard in sub-zero temps. Includes an aluminum carabiner clip for easy transport.