Comfortable Material Crew Socks 10-Pair Set, 5 Black Pairs + 5 Gray Pairs Business, Casual Crew socks and ankle socks are available in advantageous set packages. Stretchable, suitable for both men and women. Made of a cotton & polyester mix, providing sweat absorption and odor-resistant properties. Also contains polyurethane for elasticity; recommended sizes are 24cm-27cm for crew socks and 23cm-27cm for ankle socks. ◆ Crew Socks (above the ankle) 10-Pair Set Color variations: ① 10 black pairs, ② 5 black pairs + 5 white pairs, ③ 5 black pairs + 5 dark gray pairs. You can select your preferred package according to the occasion. The fabric has a moderate thickness suitable for all seasons, and can be used for a long time, from business to casual. It covers the ankles firmly, so it can be matched with suits and slacks. High sweat absorption performance allows you to spend comfortably without worrying about stuffiness even when worn for long periods. If you have the same series and colors prepared, you won't have to worry about struggling with your daily coordination. 【Product Overview】 ■ Colors Crew Socks: ① 10 black pairs, ② 5 black pairs + 5 white pairs, ③ 5 black pairs + 5 dark gray pairs ■ Materials Crew Socks: Cotton (Main) + Polyester + Polyurethane ■ Washing Instructions: Washable with water, machine wash on a gentle cycle recommended, do not tumble dry, do not iron ■ Sizes Crew Socks: 24cm-27cm (stretchable ○) Business Socks Casual Socks Set Sweat Absorption Odor Resistant Antibacterial Color...Black系 (Black-based) Sock Length...Mid-calf Condition...None (no stains, tears, or odors)