Therm-Ic Ultra Warm Performance S.E.T Heated Ski Socks with S-Pack 1400B Batteries

Thin construction and optimal fit; Discreet heating line; Foot and leg support; Optimum thermal insulation; Sweat and moisture management; Composition: 60% Polyamide, 37% Merino Wool, 3% Elastane; Comes with (2) S-Pack 1400B batteries that provide up to 9 hours of warmth; USB charging cable included