Feature:1. Rapid Heat Conduction: Energy efficiency reflects the human body heat, can quickly transfer the heat to the human skin deep, for you to lock the heat shoulder 2. Close Skin Fabrics: Using high quality skin friendly fabric, comfortable and breathable 3. Fit Body: Fit shoulder curve, farewell bloated. It will not be bloated and highlight your figure 4. Long Wear: Too strict and scientific version production and modification, wearing fit, long wear 5. Suitable for: Suitable for ac rooms. For office use, relax your shoulders. Relax your mood Specification: Item Type: Self Heating Shoulder Strap Material: Spandex Product Size: S Size: Approx. 37-42cm / 15-17in M Size: Approx. 43-46cm / 17-18in L Size: Approx. 47-50cm / 19-20in Package List:1 x Self Heating Shoulder Strap   1. Our lis