Material:Neoprene,Elastic,Mesh Colth,2 steel platesSize:XS M L XL XXLColor: Black Shoulder posture brace function:1.Great for office persons2.Supporting design helps correct poor posture3.Pulls shoulder back to correct posture4.Provides gentle back support5.Prevention of adolescent customary humpback & bend down6.Non restricting uni-sex design for men and women7.Fully adjustable, comfortable & easy to wear