CE en 1621-2 level 2 (safest) approved SaS-Tec back protective armor made of pliant and soft polyurethane foam. The material warms up with body heat and models itself to best follow the anatomy of the back. at the time of impact, the kinetic force is transmitted to the atoms that firmly bond with each other to stiffen the structure so it absorbs the impact and protects the body. When the material is cold, handle with care. Wash by hand with cold water.