The SCARPA Ribelle Tech 3 HD Boots blend the speed of trail running shoes with the performance of mountaineering footwear so you can climb in the alpine quickly and efficiently. The sole's Dynamic Tech Roll profile encourages a naturally swift gait, while Vibram's Megagrip rubber compound solidifies traction for trekking across wet rock and snowy terrain. SCARPA's HDry waterproof, breathable technology keeps your foot comfortably dry when you're stomping up aprons, and Polartec insulation ensures warmth at high altitudes. The upper also features SCARPA's Eco construction which utilizes 30% recycled materials for an environmentally thoughtful design. Layers of PU foam and firm TPU mix shock-absorbing cushioning with a stiff, supportive platform to keep you on your feet for miles and miles. Add a comfortable insole, and you'll feel like this boot was built for your foot. Lastly, SCARPA's Sock-Fit System ensures a snug-and-secure fit from the elastic band over the ankle, through the hook-and-loop strap, and all the way down to the drawcord cinch at the top of the foot.