SATISFACTION GUARANTEED - 60-DAY AFTER-SALE : The copper elbow support compression sleeve comes in four sizes. Please see our size chart for the best fit. If you are between sizes, choose the smaller size for more compression or the larger size for more comfort. We provide a 60-day after-sales service, so if you are not completely satisfied with the elbow brace, please contact us for satisfactory customer service. We believe that you will love your Copper Elbow Brace. Daily Protection - Ideal for Sports : The copper elbow brace is lightweight, breathable, and comfortable, making it perfect for daily activities such as work, sports. It is suitable for various sports activities such as tennis, golf, weightlifting, basketball, or running. The brace provides excellent copper elbow sleeve, reducing fatigue, swelling, and the risk of injury for both men and women. Medical-Grade Compression - 3D Three-Dimensional Weaving Process : The 360° three-dimensional surround and graded compression design of the elbow tendonitis brace helps evenly distribute pressure to the elbow joint, which effectively alleviates pain caused by elbow strain, tendonitis, and muscle fatigue. The ergonomic design ensures that you maintain a full range of arm motion while providing excellent elbow brace. Comfortable and Breathable - Real Copper-Infused Nylon Material : The Elbow Compression Sleeve is made of 88% real copper-infused nylon (copper ion+5000PPM) and 12% spandex material. The copper ions help deodorize, keep skin healthy, and absorb moisture. The breathable fabric of the elbow brace ensures sweat-wicking properties to keep your elbows dry and comfortable during all-day wear. It can be worn discreetly under clothing to effectively prevent injuries. Science-Backed Improvement - Copper Elbow Brace : The copper elbow compression sleeve is designed to help elbow pain caused by tendonitis, elbow bursitis, elbow arthritis, and tennis elbow in both men and women. The copper-infused nylon material helps to improve blood circulation and reduce swelling, inflammation, soreness, and discomfort. Optimal health is the greatest gift you can give yourself, your family, and friends.