Sz 12 Danner Vicious 4.5 in black/blue。Full-Grain Leather Upper To ensure its quality, we put our leather through six different tests before making our selection. Our full-grain leathers are the strongest and most durable form of leather. GORE-TEX (GTX) 100% waterproof and breathable, GORE-TEX liners ensure that no water gets in, while allowing sweat and moisture to get out. Speed Lace System Our special hardware allows you to tighten from toe to top with one swift tug for a secure, tight fit. Electrical Hazard (EH) Protection Electrical hazard (EH) footwear is manufactured with non-conductive electrical shock resistant soles and heels. 90º heel Added safety for boots used on steep terrain, climbing in and out of equipment, and use with certain tools. Vibram® Vicious Outsole Oil- and slip-resistant with a low-profile 90° heel. Danner Trailguard Lightweight and supportive, the Trailguard TPU shank provides stability and underfoot protection on rough, uneven terrain.