Dynamic Sensor Grip soleBLAZE THE TOUGHEST TRAILS: excel on technical terrain with a protective upper, optimal cushioning & aggressive tread.UPPER: breathable mesh upper offers cooling. Strategic welded overlays protect from debris. TWS – Tendon Wrapping System creates support and security in the heel and ankle for increased stability between your foot and the shoe. Internal neoprene liner provides a snug, tongue-free fit.SOLE: Dynamic Sensor Sole outsole rubber with 6mm tread gives high levels of grip and durability on all surfaces. Dual Density Sensor3 thermoformed EVA midsole & footbed for increased comfort, power, and control. Optimally placed internal Torsion Bar gives lateral stability over difficult terrain.FEATURES: SpeedLace Lock one-pull speed lacing system. 23mm heel stack height, 6mm Heel to Toe drop.FIT: Overall Fit: True to Size. Heel: Medium. Midfoot: Medium. Toebox: Medium. 290 g / 10.3 oz per shoe.