Triple Threat Aluminum Hex Discs provide a combination of biting edges and soft aluminum that morph to surrounding geology to create positive grip in rugged, rocky terrain. Sizing Guide Fishing soles come in whole sizes only and are unisex. The sole of your boot must match the size of your Korkers wading boot to function properly (e.g. Mens Size 10 Boot = Size 10 Sole, Womens Size 10 Boot = Size 10 Sole). Boot sizing can be found on the inside tongue label or on the original Korkers boot box or sole box.