The Smartwool Ski Zero Cushion OTC Sock - Women's strips away cushion for direct contact between foot and boot, then builds in a narrower heel and slimmer fit shaped specifically for a woman's foot. Indestructawool(TM) and Shred Shield(TM) reinforce the toe against wear, while the 4 Degree(TM) Elite Fit System and a wider welt keep the sock anchored through a full day without slipping or bunching. Body-mapped mesh zones add breathability where the thinner construction needs it most. What Our Gearhead(R) Experts Are Saying:"I've worn a lot of ski socks that bunch at the heel by afternoon, and this one hasn't budged through a full day of lift laps. The narrower heel shape is doing exactly what a standard cut never quite manages."