Alpinestars Men's Volcano Knee/Shin Guard 100% Other Fibers Imported Innovative knee protector construction features over injected special developed PU impact absorption material on breathable mesh Easy and fast use via two wide straps with adjustable Velcro fixation Big hole perforation and channeling throughout the protective padding provide a maximum of comfort. Tpu puller on upper strap for fast and easy use Adjustable Velcro strap system on lower part for perfect fit and size trim