Features: 1.Selected high quality elastic fabric, high elastic wear resistance, soft and skin-friendly, comfortable and warm, four seasons universal. 2.3D three-dimensional knitting technology, flat line, seamless, comfortable pressure, tight but feels not tight. 3.Sleeve design, four even elastic grading pressure, improve the motor function. 4.Double needle sewing, ribbed stitching technology is not easy to open, effective anti-slip, soft edge, no sense of pressure.