Volume: Medium Wide, 102mm last; Cuff: PU; Shell: PU; Soles: 5355 PU Extra-Grip; Buckles: Multifunction System; 1 ALU; HF back buckle closure system - Light, good looking, but especially sleek and well designed; The monolock buckle has never been so intuitive: it's just a matter of pushing it down with your foot; HF line presents the Easy Entry Shell, a system which allows the boots to open 40 degrees, so your foot slides right in; Originally designed for the US military, PrimaLoft insulation is permanently water-resistant; This is the best synthetic insulation available; Keeps feet dry; Double Axis Pivot - The cuff and the shell of the new HF are uniquelly designed to provide the perfect closure between the cuff parts and the shell; Instep Volume Control is a red insert placed in the wedge, easily visible in the heel area; Size Range: (24.5-30.5); Weight (half Pair): 1750g