Instructions? 1. Please measure your underbust to choose the correct size. If the product is on the outside of clothing, please measure your underbust after wearing the clothing. 2. The whole product is made of sponge, it's smooth and soft without any hard material, which makes your sleep more safe and comfortable. 3. It is fixed with high sticky and skin-friendly Velcro, easy to put on and take off, and you can adjust the tightness freely. 4. If there is any dyke break on the trauma place, it should be used with caution, or to avoid direct contact with it.Product Name? Arm SlingModel Number? VP0306Material: Polyester,Cotton, Nylon, Polypropylene, Polyurethane, etc.Colour?BlueSize: Small(S)?Medium(M)?Large(L)?X-Large(XL)?XX-Large(XXL) S?Underbust 25 1/2?-31 1/2? (65-80cm) M?Underbust 29 1/2?-37 1/2? (75-95cm) L?Underbust 35 1/2?-43 1/4?(90-110cm) XL?Underbust 41 1/4?-49 1/4?(105-125cm)XXL: Underbust 47 1/4?-55?(120-140cm) Washing:* Please securely fix the Velcro before washing, so as to prevent the Velcro strap from damaging or gluing other clothes.* Use neutral detergent to wash it in water at 30°C. Rinse it thoroughly with clean water after washing. Do not use fabric softeners. Do not bleach, machine wash or dry clean.* Do not wring dry after washing, but you can squeeze it by hand or use a dry towel to suck in excess water, then place it at a dry place. Do not iron, dry or expose directly in the sun.* The frequency of cleaning can be determined according to the actual use of the brace.