Improve blood circulation with graduated compression(20-30mmHg), support your foot, heel, arch, ankle, and calf, reduce fatigue, soreness, swelling, cramping and prevent injuries at the same time. Promote recovery, better oxygen circulation helps reduce lactic acid build up and aids muscle recovery in your calf, ankle, feet, and legs. Stylish, designed with lightweight, durable and breathable fabric, and keep you dry even with longer use. The superior grade circular knit structure delivers 360-degree stretch for greater flexibility and durability. Stay put soothing feeling at the bottom and sides of foot, with no pinching. Exclusive service: All REEHUT products are backed by a 30-day replacement or refund, a two-year warranty and lifetime customer support. If you have any questions, please feel free to contact us and enjoy your exclusive service.