Adaptable traction for roofing work. Accessory sole to be used with Korkers TuffTrax 3-in-1 Roofing Sandal. Provides superior traction on asphalt composition shingles. Will not leave scuff marks on hot, soft roofs. Not intended for metal or other non-textured surfaces. (Sizing US: Men's: MD 7-9.5, LG 10-11.5, XL 12-13.5, XXL 14-15, Women's: MD 8-11, LG 11.5-12). Material: Foam.