Includes: Seamless Toe for Comfort, Expanded Heel Pocket For An Improved Fit, Arch Band To Keep The Sock Stable & Mesh Venting For Improved Air Movement Infrared Nano-Particles Within the Socks Captures Body Heat Producing Infrared Energy Which improves Circulation, Stimulates Cellular Recovery & Accelerates Metabolism The Perfect Sock for Nurses, Doctor and Anyone Who Spends Extended Time on Their Feet True Energy Compression Socks Provides Temporary Pain Relief, Loosens Tight Joints, Relaxes Tight Muscles, Enhances Mobility & Improves Flexibility Helps Maximize Blood Flow Resulting in More Oxygen, More Nutrients & Enhances The Body's Natural Healing Process by Reducing Lactic Acid in the Covered Area Size Size L/XL=Men's Shoe Size (US)(10-14)/ Women's Shoe Size (US)(10.5-15) Ankle Socks with Infrared Thread- Pain Relief & Circulation Help for Nurses & More