The Zzero 4 U is the polyurethane version of the 4 buckle boot. With its transparent red colour, this is the most striking and most downhill-oriented boot in the collection. Although its weight is slightly higher, it offers incredible freedom of movement on ascent. It is also the lightest 4-clasp polyurethane boot compatible with our bindings. Thanks to the use of a Thermoflex Liner, they adapt to the shape of each foot and therefore guarantee a perfect fit. Target group: Downhill-oriented skiers who expect top performance on descent, but who also wish to be able to cover large distances. Features: Colour: Transparent Red Shell/ Cuff/ Tongue: PU, Pebax, Rilsan PowerStringer: Rilsan Buckles: 4 Magnesium + Power Strap Forward Lean: 15, 21 degrees Cuff Rotation: 30 degrees Sole: DynaGrip Ultralight Weight: 1825g Sizes: 25-30.5 + 1/2 Sizes Binding: Dynafit Quick step-in / UNI