I also use this elbow band, and here are some usage notes. **Wearing Location** Basically, wear it on your arm. If you have pain, attach the pad to the painful area. If there is no pain, attach the pad to the brachioradialis muscle (wantoukokukin). The location of the brachioradialis muscle is shown in the last photo. When playing tennis, you should immediately feel the effect of the silica gel pad when receiving a powerful serve from your opponent. The silica gel pad will cushion the impact transmitted from the racket to the brachioradialis muscle. Attach the center of the silica gel pad to the most prominent 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 Velcro to fasten securely, making it easy to put on and take off. The size can be easily adjusted. **【Size】** Free size | Suitable for both left and right arms, and unisex use, it is a free size that can be used by children to adults. It is a top-ranked, affordable elbow support recommended for healthcare.