Woolie Boolie Bliss. The IR x Defeet ® Woolie Boolie Top Socks are 6" crew socks that combine a soft wool and nylon blend for ultimate comfort and durability. With mid-density padding, they provide cushy support for all your adventures with supreme durability. Sock Size Women's Shoe Size (US) Men's Shoe Size (US) Small 6 - 8 4.5 - 6.5 Medium 8.5 - 10.5 7 - 9 Large 11 - 13 9.5 - 11.5 XLarge X 12 - 14 Technical Specs 6" cuff with padding Fabric Content - 70% Merino Wool, 27% Nylon, 3% Lycra Care - Machine wash cool. Tumble dry low or hang dry. No bleach, softeners, or harsh detergents. Country of Origin - United States