Happy feet happy campers and Light Hiker Jr. will keep ’em smiling up hill and down dale, in rain or in hail. No slipping, no bunching, and no blisters. Unprecedented durability and unique ”put it on, forget it’s on” feel. Pulls moisture away from skin. Fast drying. Cool in the summer, warm in the winter. Repels bacteria and odor. The ultimate fiber for breathability and comfort in all conditions. Undetectable seam fusion for an ultra smooth, invisible feel. Material: Merino Wool, Nylon, Lycra Spandex.