Wool. Fold back cap specially-designed with a pocket to accommodate a Heat Factory Hand Warmer. Fleece-lined with soft fleece cuffs; retractable thumb. Durable wool with Thinsulate insulation. One size fits most. Includes 2 Heat Factory Hand Warmers; warmers last up to 10 hours each A patented design that includes a pocket to accommodate Heat Factory Hand Warmers, this fleece-lined ragg wool glove with retractable thumb and finger cap provides the flexibility you need to perform tasks requiring dexterity while still keeping the digits warm. Thinsulate insulation. Includes 2 Heat Factory Hand Warmers (additional warmers sold separately).