It's hard to stay at the top. Especially when you're well above tree line, the temperature drops below freezing and the wind is howling. Our Granite 600g adds another level of warmth to our most trusted and proven mountain boot. Featuring a full 600g of insulation, dual density midsole, flex-3 rated 7mm polyurethane chassis and 100% waterproof membrane. Finished with our custom compound Rubber Outsole. The Granite 600g is a serious boot built to dominate harsh terrain in sub-freezing temperatures.