1. According to the structure of human arm, the pressure division is carefully designed and knitted with special knitting. The elasticity and elasticity are very good. 2. Prevent the appearance of arm fat and improve the symptoms of edema, swelling and heaviness of the arm 3. Beautify the curve of the arm and promote the slender curve of the arm. According to the principle of "venous fluid dynamics", the progressive segmentation pressure design can prevent the arm fatigue, promote the circulation of the arm blood, enhance the elasticity of the arm muscle and shape the beautiful curve 4. Apply gentle pressure to the blood vessels to help the upper limb blood flow smoothly back to the heart and promote blood circulation 5. Wide application: This body shaping arm shaper can be used in running, swimming, doing yoga, playing basketball, baseball, volleyball and other sports; Note: The fabric is elastic, but not too much pulled, easily damaged