Studded Vibram® interchangeable sole with OmniTrax technology. Traction: Same sole as Vibram® Idrogrip 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.