Designed specifically for running trails and the occasional stretch of road The North Face Men's Amp Boa Trail Running Shoe offers the innovative easy-to-adjust Boa™ Lacing System. This lacing system provides a unique glove-like fit that allows minute and repeatable adjustments with a simple twist of a reel. Using replaceable ultra light stainless steel lace cables the Dynamic Closure™ slides easily through patented elongated lace guides to distribute a precise closure. This unique cinching system maintains a constant fit and eliminates pressure points by automatically micro-adjusting to ever changing foot movement. A Northothic™ ergonomically designed multi-density footbed weaves AgION Anti-microbial silver agent into the top sheet of the footbed to inhibit the growth of odors and disease-causing bacteria. Ideal for the light and fast multisport minded athlete a X-2 O™ heel air bag provides added cushioning and protection the Roll Control™ medial heel wedge maintains stability a TPU shank plate protects against stone bruising and the UltrATAC™ all terrain outsole provides excellent traction for running on trails scrambling over scree or for every day use.