Protection is only good if you use it. Usually cumbersome to put on, upper body armor was tough to slip into. Alpinestars Bionic S2 short sleeve jacket has a zipper in the front just like any other jacket you put on. Because it is a short sleeve jacket, there is no elbow protection. All of the armor attaches to a stretch net construction, with the shoulder and chest armor connected by adjustable straps for a custom fit. Easy to wear, light enough to fit under a jersey, this short sleeve protection jacket is ready for action.