La Sportiva Women's Core High GTX Trail Hiking Boot gore-tex Shaft measures approximately 5" from arch LONG DISTANCE HIKING BOOT - An over-the-ankle, all synthetic hiking boot designed for moving fast on all types of terrain; Durable, lightweight, highly breathable materials minimize fatigue during long hikes and backpacking trips GORE-TEX PROTECTION - Waterproof, breathable Gore-Tex Surround technology keeps your feet dry during extended day hikes or overnight backpacking trips no matter the weather BREATHABLE - Ultralight moisture-wicking AirMesh fabrics with Nano-Cell technology keep your feet cool on hot days, control moisture, and prevent blisters STABILITY & CONTROL - Vibram Nano sole with Impact Brake System provides excellent traction and stability on steep descents; Confidently navigate rocks, roots, and other obstacles with the Core High GTX's reinforced compression-molded EVA / TPU inserts ANKLE SUPPORT - STB Technology stabilizes the foot by wrapping and unifying the midsole with the upper for the perfect locked-down fit to provide the extra support and stability ultralight backpackers and mountaineers need for high mileage days