PATONS-Kroy Socks Yarn. The wool and nylon combination allows for washability and durability and the wool content wicks moisture away from the skin. Weight category: 1; 75% Washable Wool/25% Nylon; 166yd/152m. Suggested knitting needles: 3/3.25mm; crochet hook: D3/3.25. Care: machine wash; tumble dry; do not bleach; do not iron; do not dry clean. Imported.