Description of The North Face Arnuva 50 Boa Trail Running Shoes The Arnuva 50 Boa is built for the ultra distance runner who runs trails, dirt paths, even road, and offering the innovative Boa® lacing system for a secure, near-custom fit. Features: Last : Endurance Running Approx Weight : * [Half-Pair] 12.5 oz (355 g); [Pair] 1 lb 9 oz (710 g) *based on Men?s 9 Northotic™ Anti-Microbial Footbed - The Northotic™ is a multi-density footbed that provides enhanced stability, support and cushioning on the trail. X-2™ Cushioning Technologies - Ideal for the varied uses of the multisport athlete, the added measure of cushioning and protection for the athlete moving fast over rugged terrain. Boa® Lacing System - Unlike traditional lacing systems, the carefully engineered Boa® system enables minute adjustment for optimum closure force each and every time. Technical Rubber Outsole Compounds - Would you buy a one-size-fits-all shoe? We didn?t think so. So why would you look at footwear that utilizes the same rubber outsole for all activities? NorthFit™ - The mission of NorthFit™ is to scientifically outfit the outdoor athlete with the most precise fit. Built for the athlete who runs trails, dirt paths, even road, and offering the cutting-edge Boa® lacing system for a rapidly-adjustable, secure fit Boa® multi-adjust lacing system Abrasion-resistant, bomber synthetic nubuck with highly breathable, protective sandwich-mesh upper TPU injection saddle for medial/lateral midfoot support Northotic™ ergonomically-designed footbed with Poron® forefoot and heel inserts Lightweight, dual-density, compression-molded EVA midsole with X-2™ provides high impact cushioning and long lasting support Semi-curve lasted, with medial-posted rearfoot Thrust Chassis™ and X-Dome™, which provides mechanical assistance to the midsole and support for overpronators Tenacious Grip™ outsole provides excellent on-and-off-road traction, as well as stability and durability under a variety of weather conditions and temperatures UltrATAC" all terrain, all condotion rubber outsole with excellent wet/dry traction for running on road or trail