This truly versatile base layer liner treats high-grade polypropylene with Alphasan technology natural, silver based antimicrobial treatment to give you an odoor free, blister resistant sock liner, minus the weight and bulk. They wick, breathe, reduce friction... and the synthetic yarn will simply not wear through. Made in the USA. Content 77 polypropylene, 17 nylon, 3 elastic, 3 lycra Mens shoe sizes Medium 5-8 , Large 9-12 , X-Large 13-15 Womens shoe sizes Small 4-7 , Medium 8-11 Size SmallMediumLargeX-Large Small Medium Large X-Large Qty Add to Cart Slideshow Other popular items Slide controls Kahtoola MICROspikes 5.0 star rating 4 nbsp Lineman Extreme NI ST 5.0 star rating 17 nbsp Corrie Black 4.7 star rating 51 nbsp Mountain Extreme 400 4.9 star rating 136 nbsp Alaska Super Heavyweight... 4.7 star rating 25 nbsp Waterproofing Boot Wax 4.9 star rating 74 nbsp Cushion Insoles 4.6 star rating 22 nbsp Boot Laces 4.9 star rating 28 nbsp