Studded Vibram XS TREK interchangeable sole with OmniTrax technology. Features: Traction: Vibram XS TREK compound with 36 carbide-tipped studs per pair. Sticky rubber with a deep, wide lug pattern for cutting through algae and gripping terrain. Ideal for extremely slippery aquatic environments. Fit: Match the sole size with your OmniTrax 3.0 boot for a perfect fit. Sole Sizing Information: 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. Men’s Size 10 Boot = Size 10 Sole, Women’s 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. Korkers Studded Vibram XS Trek Sole - Black