Made for endurance, comfort, and maximum in-river stability; with the exacting adjustability of the BOA fit system, the G3 Guide BOA Boot - Vibram is the grippy standard worn by far-ranging guides and anglers who live to get it done. FeaturesBOA Fit System with an improved M4 dialDurable and high abrasion-resistant leather, synthetic woven, and rubber upper materialsBuilt with a traditional work-boot construction that utilizes a Goodyear welt for comfort, stability and durabilityDrain holes to prevent water poolingVibram(R) Idrogrip with Traction Lug outsole optimizes stability while walking and wading in waterThe outsole is compatible with Simms Alumibite Star Cleats and Hardbite cleats/studs