Single Barrel:Flow comfort foam with a vented tongue to reduce moisture. Integrated lacing system for heel hold and support and velcro positioning tabs to 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. * Flow Kush Outsole:Made with 100% injected EVA. Durable tread and designed for traction. Noticeably reduces overall weight of the boot.