Design: Durable no-sew overlays and ripstop mesh upper for a comfortable, long-lasting fit Featuring Altra's Original FootShape Fit with room for your toes and space through the midfoot to promote natural foot movement In-Shoe Comfort: Updated Altra(R) EGO(TM) midsole foam for comfort and ground connection Stoneguard(TM) insert provides underfoot protection on the trail, over rocks, debris, and tough terrain with a flexible yet firm and stable feel Durability & Traction: Updated MaxTrac(TM) outsole for a sticky underfoot grip and improved durability on the trail Additional Details: GaiterTrap(TM) allows for easy strapless gaiter attachment without fasteners, bungees, or bindings Weight (Size 8.5): 9.5 oz / 269.3 g