Strong Opaque Unisex material and sizing, hugs legs and will feel tighter than your average support sock. May be a bit more tedious getting them on. 20-30mmHg Provides graduated pressure in a comfortable range – 78% Nylon 22% Lycra Spandex – Reinforced Heel And Toe – Soft & Comfortable, Non-constricting Top Band, Flat seams on foot.