The North Face - Fortress Peak GTX (Mud Pack/Rust) - Men's: One piece full leather GORE-TEX(R) boot suitable for three to five-day treks carrying loads up to 50 lbs. GORE-TEX(R) waterproof, breathable membrane. 2.0-2.2mm waterproof leather upper. AgION(tm) anti-microbial lining. Molded rubber toe cap. Lateral medial support system. Northotic(tm) ergonomically-designed, multidensity footbed with AgION(tm) anti-microbial top sheet offers stability and support on the trail. Speed lacing metal hardware with instep lace lock. Gusseted tongue. Dual density PU midsole. Heel X-2(tm) for cushioning, energy return and pressure relief in high impact areas. TPU shank plate with articulated forefoot flex notches. Exclusive Vibram(R) outsole provides superior traction and stability on various types of rugged terrain.