The Alpinestars Roost base layer top is a protective base layer with strategically placed padded zones on the shoulders, biceps and chest area to provide additional protection against tyre roost, gravel and small stones. It is compatible with all Alpinestars roost guards and chest protectors. The knitted construction chassis is lightweight, breathable, and provides a comfortable tight fit while being stretchable enough not to limit any rider movements. The knitted construction requires less stitching, which increases rider comfort.