Wrist patch can provide warmth to the wrist and hand evenly and stably, all materials used are medical grade, fabric used is medical grade spunlace non-woven fabric, it can direct to skin, we have test reports of skin irritation, skin sensitization and in vitro cytotoxicity. It is non-adhesive , made by elastic fabric and Velcro, so that it can be adjusted according to the shape of everyone’s wrist, fitting to the wrist well and supplying great heat comfort during using. Everybody never hope what they buy and get is not what they want or cannot be used well. Especially we never hope it happen to our customers. So our factory attach great importance to the quality control of products. We will keep the delivery time and ensure product quality at the same time.