Feature: High quality soft fabric, comfy to dress up. Color: black. Size: free size. Material: nylon mousse. Function: Wavy concavo-convex designed to stimulate the arms. In the face of the concave and convex design with action produces fin motor,Stimulate my muscle. Accelerate to burn calorie. Notes: Do not bleach, can be hand washed, dried . Do not use dryer drying . Wear, do not pull-off force in order to avoid product damage. When wearing, nail care, so as not to scratch a bad product . Package include: 2 x Upper Arm Shaper Massager