The OMP Rib Protector KS-1 Pro 10mm thick insert designed to provide additional padding for thinner drivers who require a more comfortable and secure fit when wearing the rib protector. The insert is made of high-quality shock-absorbing memory foam that provides exceptional protection to the driver's ribs and chest area. The insert is easy to install and remove, and is designed to fit perfectly with the OMP KS-1 Pro Rib Protector. Sizes: S, M, M width, L, L width, XL, XL width