Infusion’s three-layer design includes everything you need to stay warm and dry – and to hunt longer. EACH SEAT CONTAINS: A thermal barrier of Softek™ closed-cell foam for maximum heat retention, A comfort barrier of premium, furniture-grade urethane Comfotek™ foam, and An earth barrier of rigid, closed-cell foam that protects your backside from the cold, wet ground. With freeze-proof fabric that won’t get hard in sub-zero temps.