The USD Shadow Shock Absorber is an essential component for all Shadow inline skates, designed to provide optimal comfort and performance. This 15mm shock absorber is crafted to reduce vibrations and impact, ensuring a smoother and more controlled ride. Whether you're landing jumps or navigating rough surfaces, the enhanced cushioning significantly improves the skating experience.It's crucial to order the correct size for your skates to ensure a perfect fit and maximum efficiency. Compatible with all Shadow skates, this shock absorber not only enhances performance but also extends the longevity of your skates by absorbing stress and preventing wear and tear.USD SHADOW sizing: EU S=38-42 / L=43-47XSJADO sizing: UK S=5-8.5 / L=9-12.5