Wigwam F1403 Fusion Everyday wool crew sock for everyday use with an integrated Olefin liner for the ultimate in dry-lined comfort Because the liner is fully integrated with the outer fabric, we are able to achieve enough -give- in the sock to reduce friction and are able to increase the effective moisture movement properties of the fabric 1×1 true rib top 3×1 mock rib leg Lightweight jersey sole Ultra smooth lin-toe closure Tested and recommended by WL Gore for use with GORE-TEX footwear