The Heat Holders 3.5 Tog Neck Warmer is delightfully soft and warm, with a silky, fur-like HeatWeaver thermal lining that traps warm air to keep you warmer for longer. The high performance Heat Holders insulating yarn protects against the cold and wicks away moisture to keep you dry and comfortable. The neck warmer is sculpted to drop low to contour around the chest, neck and chin for extra warmth and protection. Outer: 52% Polyester 48% Acrylic, Lining: 100% PolyesterMachine washable at 40°