The Sidi Performer 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 Shaped and Fixed Shin Plate with Lower Air Channels Metatarsus External Protection Internal and External Shaped Ankle Pads Calf Area Exhaust in Soft Polyurethane Protected with Mesh - Ensures optimal airflow Soft Arch Area 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 Elastic Panel Adjacent to the Closure on the Calf Area Smooth Heel Cup - For more adherence with the bike Shift Pad Replaceable Toe Slider - The slider is replaceable and available in fully nylon, with ceramic or with aluminium inserts Nylon Inner Sole with Removable Arch Support Pad CE Approved - Tested, trusted, have the piece of mind, you are protected by the best available