Graduated Compression Technology (20-30mmHg)】: Our knee high compression stockings (20-30mmHg) promote blood circulation through Graduated compression technology. Large size and small size socks.They are especially suitable for people who exercise after long-distance flight,surgery. Wearing this medical grade stockings can Relieve surgery swelling,anti DVT, calf and ankles and prevent cramps,Swelling.helps muscle recovery and varicose venous. Effectively relieves your leg edema. 【No Cuffs, Thickened Design】