The Vertigo series of boots are the only boots to offer a patented adjustable calf system designed to accommodate calves of virtually any size. With a simple adjustment of the Tecno VR knob, the internal monofilament line will close and wrap the boot around the riders calf in micro adjustments for a perfect fit. Every Vertigo boot's outer is fully constructed with Lorica, a composite micro fiber material that afcts like natural leather skin, but is stronger, softer, lighter and offers better moisture protection. Lorica is also highly resistant to abrasion – yet it still breathes. Lorica doesn’t stain and can’t be scratched, and it delivers more flexibility and more feel than leather racing boots. On the inside, each Vertigo boot is lined throughout with lightweight perforated Teflon treated fabric in order to allow moisture to “breath” out to the Lorica outer and dry quickly with no mold build up in the long term. Every Vertigo boot features a snap-lock vent panel, located on the outside of the foot so riders can choose the maximum airflow setting. Riders can send air rushing inside the boot or close the vent to enjoy a sealed, airtight and watertight boot. The Vertigo's revolutionary three stage, shock absorbing heel cup is molded with three different densities of plastic. This system, another first in motorcycle boot technology, offers a built in shock absorbing range of three millimeters. The heel cups internal area is fully lined with impact resistant thousand-air cell memory foam for an extra level of comfort and protection. The shifter pad on the Vertigo boot is molded of Dupont Techno-polymers, which ensure that the plastics qualities will not change in high or low temperatures. The same pad is used on the right boot, to assist riders who's riding style includes tucking their foot under the brake pedal. A new dual compound, non-slip sole was designed for the Vertigo boots. It delivers maximum comfort and safety. All bolt on components of the Vertigo boot are available separately. Riders can change the various components to replace items that have worn or have been damaged in a crash. The Vertigo uses bolt on (no Velcro!) replaceable, adjustable and aerodynamic nylon/ceramic skid pads on the toe. The shin deflector plate is the only replaceable deflector plate available in racing today. The Vertigo Corsa (same boot, but with an added strap over the front of the foot) was awarded the Motorcyclist Magazine "Best New Product" Award for 2004!