Alpinestars has been a leader in the motorcycle industry for years because of their amazing quality, performance, and durability. The Bionic SP vest brings all three together to offer outstanding protection.
With a CE certified bionic back protector and chest guard the Alpinestars Bionic SP Vests shows their commitment to safety.
The Alpinestars bionic SP vest is constructed using stretch mesh for maximum comfort.
An adjustable kidney belt is built into the Alpinestars bionic SP vest for a secure and comfortable fit.
I'm about 5' 10" 160lbs and i wear the medium size vest. it fits really well and the built in kidney belt really keeps everything tight. really comfortable to move around in you hardly feel like you have it on.. if you're looking for protection and alot of mobility this vest is awesome.
It depends on your needs and wants. If you don't want the full protection and would rather have breathability then this is the way to go. If you think you're going to need the maximum amount of protection get the jacket.
we are in the process of updating sizing charts for all products. in the meantime you can go to alpinestars sizing chart which will help you in sizing the correct protector.
no modifications will need to be done on the brace itself, I was referring to the protector will need to be modify to accommodate the brace. As to what those mods would be, I don't know. But from looking at the back spine protector, it would seem like it would obstruction how the leatt sits on the back.