The Alpina Alaska 75mm Backcountry Boot is bold, strong, and no-nonsense. Alpina modeled it on a burly hiking boot, with a tough leather and synthetic upper that protects our foot from the elements and endows the boot with a moderately stiff flex for plenty of control, uphill and down. For extra protection, Alpina integrated a waterproof and breathable Alpitex membrane into the boot, so extended tours don't leave our feet soaked, and also included Thinsulate insulation to keep our toes warm when we're making our way through wild woods and across untracked fields.