The Scarpa F1 XT Alpine Touring Boot is an efficient uphill boot for avid backcountry skiers and ski mountaineers. These boots help you cut a new skin track and reach tricky ridges with a super-lightweight Grilamid construction, overlap shield tech design that keeps snow out of our socks, and a Seed Lock LT walk mode that provides friction free movement. Although the brand's size chart has recommendations for how to choose your size, customer feedback suggests this shoe runs small, we would suggest sizing up if you are unused to a tight performance fit.