The Crotch lining is cotton for added softness and breathability

Machine wash with a laundry bag or Hand wash suggested

and they won't stretch out through the day

Product ID:PO10195

Flower Series Compression Socks(6 Pairs) Floral The Crotch lining is cottonThese Flower Series compression socks gently promote healthy circulation and help alleviate leg fatigue from prolonged periods of standing or sitting. All day comfort and reliable leg support 1530 mmHg compression boosts circulation and reduces fatigue Snug ankle fit with gentle stretch for easy wear Ideal for work, travel, exercise, or daily comfort Breathable, moisture wicking fabric keeps legs fresh Material 55% Polyester, 40% Nylon, 5% Spandex