The Sidi Vertigo II Sport Motorbike Boots are packed with features... Specifications Include: MATERIALS Technomicro Microfibre Upper - When constructing most of their boots, Sidi uses a new generation material called "Technomicro". Technomicro is a composite microfiber material created from strands that are so fine, each one is less than one thousand the thickness of silk. These fibers act like natural leather skin, but with the advantage of better strength, softer texture and lighter weight. Technomicro is also water resistant, highly resistant to abrasion and tearing and is easy to clean and maintain. Technomicro doesn\'t stain and offers reduced weight, more flexibility and a better feel than leather or other synthetic material boots Lining - Lined with air Teflon mesh Rubber Top Sole - Designed for improved grip TECHNOLOGY Fixed Shin Plate - The shin plate is replaceable. It is made in polyurethane TECNO-3 Iron Calf Adjustment Mechanism - TECNO 3 Iron mechanism closes the boot and adjusts the calf circumference with a resistant steel wire which, passing through the upper is fixed to the internal cable holder. TECNO-3 Iron, the upper and the cable holder are replaceable Anti-Twist Ankle Support Braces - The anti twist ankle support braces prevent the foot from twisting and protect the ankle against impact. The brace is in nylon reinforced with carbon fibre that allows for natural and comfortable ankle movement. The ankle support brace is replaceable Elastic Insert on Ankle - A small elastic panel aids in a smooth zipper operation as it allows a bit of movement via the elastic as the zipper passes over the rider\'s ankle ball Side Air Ventilation System - On the outer lower part of the boot an air intake is fitted which can be operated by an aerodynamic shaped button Shift Pad Replaceable Toe Slider - The slider is replaceable and available in fully nylon, with ceramic or with aluminium inserts Shock Absorbing Heel Cup - A polyurethane shell holds a shock absorbing insert, visible from the outside through small slits that mark out the look of the heel. The shell is mobile as it is fixed to the boot by 2 screws that allow 3 mm of impact movement Nylon Inner Sole with Removable Arch Support Pad Reflective Insert on the Back CE Approved - Tested, trusted, have the piece of mind, you are protected by the best available