YTH Baseframe Pro LS. Koroyd Impact Protection in a Breathable Long Sleeve. Mesh fabric for maximum breathability to keep you cool on the bike. Koroyd inserts with patented auxetic structure to allow for maximum mobility. Compression sleeves and side panels to secure the guard inserts, and maintain a close to body fit. Bonded collar with a wide neckline for comfort, and to help integrate seamlessly underneath the jersey. YKK® zipper at bottom hem for easy removal. Removeable Koroyd inserts can be machine washed for easy cleaning. EN1621-1 Level 1 Koroyd elbow and shoulder inserts. EN1621-2 Level 1 Koroyd back protector. EN1621-3 Level 1 Koroyd chest protector.