Originally Posted by Merckx the Cannibal
I'm not sure, but maybe you're seeing people who are wearing back protectors? Some back protectors have a strap across the waist, as well as shoulder straps. Maybe you're seeing people who are wearing back protectors under their T-shirts, but with the waist strap exposed. Or maybe it's a German thing and not a North American thing and in that case, I'll just shut up.
Nah its just a kidney belt they wear. On top of their t-shirts, that being their only protection besides the helmet obviously. Must be a local Berlin thing then. Just recently moved here and started riding so cant really compare, but tend to see this daily. Just glad to hear that it is not more common thing.