Features: Achieve proper spinal alignment with this adjustable postures corrector featuring 8MM highly density sponges padding and breathable nylon webbing for support during extended wear. with velvets cloth construction and four size option (S XL), this correction belt molds comfortably under clothing while providing targeted shoulder support. for adults seeking to improve workstation ergonomics, students maintaining study postures, or fitness enthusiasts during training session. Wear seamlessly during computer work, household chores, driving commutes, or gym to actively train muscles and prevent slouching habits. The double layer reinforced structure combines medicals grade correction principles with everyday practicality, promoting gradual postures improvement through consistent 20 minutes daily . Specifications: Material: Cotton Color: Light Gray, Black Size: S, M, L, XL (optional) Package Includes: 1PC Back postures Corrector note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.