The North Face - Bolt (Classic Taupe/Algae) - Men's: 1.4-1.6 mm pig suede leather upper. Natural rubber toe cap. Lace-to-toe lacing allows a personalized fit. AgION(tm) anti-microbial lining and X-2(tm) footbed offers cushioning, energy return and pressure relief in high impact areas. 2/3 - length steel shank insert. Cushioned bi-layer cut and buff EVA midsole. Vibram(R) rubber outsole provides superior traction and stability on various types of rugged terrain.