Alpinestars mtb bb back protectorthis mtb back protector from alpinestars is a lightweight full coverage ce certified back protector with an ergonomic five plate construction that follows the natural curve of the back with locking plates that lower the possibility of over extending the back it is compatible with the bns neck brace and is designed to fit under a jersey secure personalised fitthis back protector is well ventilated and even if compressed tightly against the body will circulat