Outside, there are 450 unique 3D fabric technology small grooves on the surface, which can greatly increase the contact area between the fabric and the air and make it easier for the air to take away heat. Inside, there are 50 layers channels, which can effectively absorb sweat and prevent sweat from flowing down your back. Different functions inside and outside, constituting a 3D moisture wicking system. Compared with traditional clothing, it can achieve 69% improvement in moisture wicking performance.