The lightweight, ergonomic design of the F1 hugs the rider s body. The removable backplate offers extensive customization options. The 2023 F1 chest protector has a new chest area for even more comfort. Features Lightweight, shock absorbing chest & backplate Adjustable shoulder section & removable backplate Click-Tec quick release fastener for easy on & off Multiple ventilation holes & air channels for better air circulation Neck protector compatible Bio-liner for more wearing comfort Size S-M for rider weight up to 57kg Size L-XL for riders weighing 57kg or more