Copper Elbow Compression Sleeve-1 PAIR Infused Full Arm Sleeves for Enhanced Circulation & Tendonitis Pain Relief - Increase Performance, Reduces Swelling & Accelerates Recovery INCREASE PERFORMANCE & RECOVERY - Our compression sleeves stimulate blood flow & oxygen to muscles for better performance, while increasing the removal of waste products such as lactic acid to help reduce soreness during and after working out SPECIAL LIGHT WEIGHT MOISTURE WICKING FABRIC - Our graduated compression is specially designed to provide a firm comfortable fit with 18-22 mmHg from forearm to bicep. VERY IMPORTANT - These sleeves are designed to give maximum support and firm fit. Bicep measurements: S 8-10", M 10.5-13", L 13.5-16.5". If you are unsure, order the larger size. WORK OR PLAY - Our compression sleeves benefit you whether you are an athlete working out for hours, a working professional using your arms regularly or someone who remains immobile for long periods of time or has poor circulation. ADDED PROTECTION - C4 sleeves protect in many ways. Warm-up for that morning work out, reduce arm soreness and fatigue from repetitive motion for that tennis player, provide warmth and scratch protection during that morning trail run, help construction workers and other professionals prevent tendonitis, can reduce the risk of blood clots in individuals with poor circulation. The list goes on and on. HIGHEST QUALITY MATERIAL - Our athletic sleeves are made a 80% Copper Nylon/ 20% Spandex blend of breathable material designed to provide the desired support without sacrificing a comfortable fit AND they come with a MONEY BACK GUARANTEE no questions asked.