Flexible and quite dense. Throughout the structure of the bone, the thickness is the same. The thickness is the same throughout the entire length of the bone. Chemical resistance to salt water, sweat, detergents, and low-concentration acids (10%). Due to the lateral bones, the bra belt does not twist and provides better support for the chest. Length: 50mm, 70mm, 90mm, 110mm, 130mm, 150mm, 170mm, 190mm, 210mm, 230mm.