The Oakley Sierra Terrain Shoes are built for warm-weather adventures with a highly breathable, water-repellent upper that combines premium suede panels and ultra-tough Cordura nylon fabric underlays. For maximum grip across unpredictable terrains and wet trail surfaces, the shoes utilize a premier Vibram XS Trek natural rubber outsole. Protective engineering is enhanced by heavy-duty rubber paneling across the toe cap and heel counter to defend against trail debris and scuffs. Functional reflective accents are placed along the quarter paneling and eyelets to increase visibility during low-light night missions. The athletic silhouette is neatly finished with a debossed Oakley Bark logo on the tongue and an embossed Oakley Ellipse logo stamped onto the lateral heel.