Just put it on and start your spine muscles. The sagging attracts the shoulder blades and naturally leads to correct posture with a pinched back and releases tension in the trapezoid muscles in the back of the shoulder blades for ease of shoulders. The special shape does not interfere with movement of the shoulder blades so the shoulder blades can be easily moved without feeling constricted and the arm weight is about 6-10 kg on both arms, and the shoulder joints open outward. The spiral compression reduces the shoulders. It is thin and stretchy, so it is not too uncomfortable and does not show through your outerwear. Made with Toray Cupupu Aqua, this material is moisture wicking and quick drying so you can stay dry and comfortable all year round.