1. Material: Silicone 2. Process: This product is made of medical-grade silicone material, which is waterproof, sweat-proof, comfortable and soft. The strap is thickened, comfortable to wear and easy to use. The material is harmless to human skin and is not allergic. 3. Product size: medium size (universal for men and women), the length can be adjusted for easy adjustment. 4. Packing: opp bag packing
