Flow Rift Boa Coiler Boot - Men's 3 Barrel:EVA reinforcement panels provide a stiffer full support boot flex and improved ankle fit. Flow comfort foam with a vented tongue to reduce moisture. Comfort top cuff, velcro top strap and velcro positioning tabs eliminate tongue drifting. A custom flex zone in the forefoot improves fit across the toes while an anti-microbial finish eliminates odor-causing bacteria. BOA:The New BOA H3 design and updated functions are easier to use and ensure micro-adjustability with no pressure points. Gram for gram, BOA laces are stronger than tank armor. Guaranteed for life BOA is industry leader in closure systems. Venting Flow Kush Footbed:Anatomical shape with heel contour and arch support. Single density EVA reinforcement for superior dampening and comfort. Vented to improve airflow and reduce moisture. Fly-Weight Kush Outsole:50% Weight reduction from our standard outsoles. Contour molded dampening midsole with torsion control internal shank. Super soft OC Kush heel insert will soften those harsh landings. High-abrasion anti-slip rubber in critical durability zones. Low-profile tread pattern. You don't need large lugs for superior grip. Rift Harness:Anatomical internal harness with lace closure and locking hardware. Stitched into boot shell to eliminate heel lift and improve power transfer.