La Sportiva Size Chart The Genesis Low GTX is a low-cut, lightweight hiking boot that's tough enough for outdoor adventures without being too bulky. The design pairs a durable leather upper with the waterproof breathability of Gore-Tex(R) Surround(TM) Technology. The Vibram(R) Nano sole with Impact Brake System(TM) provides excellent comfort, traction and grip. Features: - Innovative Nano-Cell(TM) Technology works in conjunction with the innovative Gore-Tex(R) Surround(TM) Technology to enable unprecedented breathability - The durable nubuck leather upper provides protection - STB(TM) Technology stabilizes the foot by wrapping and unifying the midsole with the upper for the perfect locked-down fit and added stability - Vibram(R) Nano sole with Impact Brake System(TM) provides traction and grip on unstable terrain - Weight: 15.60 oz (443g) - Last: Tempo - Construction: Strobel lasted - Upper: Nubuck leather / Nano-Cell(TM) direct injection / PU leather - Lining: Gore-Tex(R) Surround(TM) - Midsole: Compression Molded EVA / TPU inserts - Sole: Vibram(R) Nano with Impact Brake System(TM)