Race Face Ambush Knee Guard: Black XLFeatures D3O high performance foam and an open back construction so no shoe removal is necessary. D3O high performance shock absorbing foam on the front and foam padded sidewalls for additional coverage Perforated Neoprene enhances venting and moisture control; terry lined for wicking and comfort Integrated stabilization pad centers the knee and ensures a secure fit Branded rubber grab tabs and RF moniker logo Open back construction; no shoe removal