With all the features you need to work, sweat, and rest, these socks will get you through your whole day (and then some). Designed for On the Move. Crew Length. PerformaHeel is 3D knit with dual yarns to provide stretch and integrated micro-cushioning while creating a shaped fit that stays put. ErgoToes foot-specific design. Reflective detail. 360 degree arch support. Seamless toe construction. 'Wash with like colours', 'Machine wash cold', 'Do not bleach', 'Tumble dry low', 'Do not iron', 'Do not dry clean', 'Imported'. Sock back: 95% Nylon, 5% Lycra elastane. Sock front: 95% Nylon, 5% Lycra elastane.