Jobst 30-40 mmHg Activewear Knee High Support Socks providing effective leg therapy in energizing unisex athletic compression socks. * Dri-Release yarn which looks and feels like cotton help keep feet dry and comfortable. * Non-constricting comfort band keeps socks up without binding or pinching. * Reinforced heel resists abrasion and provides greater durability. * Seamless toe and 360 degree cushioned foot increases comfort. * Machine wash support socks in a mesh laundry bag or hand wash with warm water using a mild soap or detergent designed for compression stockings. Machine dry on low heat. * 58% Polyester 20% Nylon 10% Cotton 12% Spandex Latex Free. * 30-40 mmHg (CCL 2) Very Firm Gradient Compression Indication Guide: Chronic venous insufficiency Deep vein thrombosis Post-thrombotic syndrome Severe varicose veins Severe edema / lymphedema Venous ulcer Lymphedema Orthostatic hypotension Postural hypotension Helps Prevent DVT (Deep Vein Thrombosis)