Vasque - Sundowner Summit GTX (Dark Brown) - Men's: A dual-density PU midsole and patented Kinetic insole make this premiere backpacking boot incredibly comfortable without sacrificing support and stability. 2.6mm waterproof smoothout leather upper. Exclusive Vibram Summit outsole. 3-bar nylon and GORE-TEX waterproof lining. Protective rubber toe rand. Roller-ball lacing hardware.