Men's Hoka Challenger ATR 8 All Terrain Running Shoe Color:Maple Cardamon As mentioned in the description

As mentioned in the description above this technology took the strongest structure in nature and placed in on the outsole

Outsole & TractionUses Durabrasion rubber

Made with sustainable recycled polyester jersey

Compatible with Coros armband heart rate monitors

Men's Hoka Challenger ATR 8 All Terrain Running Shoe Color:Maple Cardamon As mentioned in the descriptionMen's Hoka Challenger ATR 8 All Terrain Running Shoe Design & Build Midsole CushioningUses compression molded EVA (CMEVA) foam thats softer than prior versions. Theres more foam underfoot in this Challenger 8 than the Challenger 7. The stack height is ~42 mm in heel and ~34 mm in the forefoot (mens) giving a plush platform. Drop~8 mm heel to toe drop. Thats increased from previous versions. Outsole & Lugs Traction4 mm multi directional lugs for grip