Manufactured in sizes specifically for younger kart drivers, these Sparco K-Run kart boots are designed for maximum performance and driver comfort. The microfiber leather construction coupled with ultra-breathable 3D mesh provides a comfortable fit with reduced perspiration. Lightweight and breathable for optimal comfort. Sizes specifically for nstein engineers at the Nürburgring Nordschleife. Height reduction from 30 to 50 mm at the front and rear. Height adjustment up to 20 mm when mounted on two axles. High-quality springs made of a long-lasting material. Spring seats (cups) and fixing nuts made of a special aluminum alloy. BILSTEIN mono-tube pressurized gas technology, from the circuit to the workshop, with the guaranteed quality of a Made in Germany product. Triple-C Technology® anticorrosive surface treatment for long-lasting durability against corrosion. They can be legalized for road use. They have TÜV Certificate.