The Alpinestars Bionic Action chest protector is available in two sizes: medium/large and extra large/double extra large. The medium/large fit most of our test riders, but it was on the big side for riders under 5-foot-9
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MXA TEAM TESTED: FOX RACING PROFRAME LC CHEST PROTECTOR
An ultra-lightweight protective system offering excellent upper body protection against impacts, this protector features an all-new chest protector
Alpinestars 6700421-13-M/L Bionic Action Chest Protector - Black/Red (Medium)/XL