I also use this elbow band, and here are some usage notes. **Wearing Area** Basically, wear it on your arm. If you have pain, place the pad on the painful area. If there is no pain, place the pad on the brachioradialis muscle (wantoukokukin). The location of the brachioradialis muscle is shown in the last photo. When playing tennis, you will immediately feel the effect of the silica gel pad when receiving a powerful serve from your opponent. The silica gel pad cushions the impact transmitted from the racket to the brachioradialis muscle. Please attach the center of the silica gel pad to the most protruding part of the brachioradialis muscle. **Product Specifications** * Product Weight: Approximately 50g * Material: 45% Silica Gel + 50% Nylon + 5% Polyurethane * External Dimensions: Approximately 15 * 22 * 8cm * Packaging: OPP Bag * Included: 1 Blue and Black Elbow Band **【Multi-Purpose】** Wear it for tennis, golf, baseball, badminton, weightlifting, racquetball, squash, volleyball, and other sports and activities that require the use of forearm muscles. **【Material】** This elbow support uses a thin, breathable material, achieving weight reduction without compromising the support feel of the elbow. The fabric is soft, breathable, and moisture-wicking, with strong elasticity and a long lifespan. **【Ergonomic Design】** Adopting a high-quality sponge design, it fits better and can cushion impacts. By stimulating and promoting blood circulation around the joint, our brace helps the body heal naturally. **【Excellent Fixation】** The elbow support uses strong adhesive Velcro, making it easy to attach and remove. You can easily adjust the size. **【Size】** Free size | Suitable for both left and right arms, unisex, and a free size that can be used by children to adults. It is a top-ranked, affordable elbow support recommended for healthcare.