The Youth Bionic Action Kickstart Chest Guard is Alpinestars’ MX chest and back protector for off-road youth riders aged 4–9. Featuring semi-rigid TPR protection on the chest and back with floating shoulder cups and bicep guards, plus a semi-floating, V-shaped chest panel on a lightweight, ventilated chassis. Wide elasticated hook-and-loop adjustment and a padded, wide-opening collar deliver secure coverage, growing-room comfort, and easy on/off.