Hey guys just got my Knox Gilet Air back and chest protector , Awesome piece of work , very comfortable and super lite (i'll post pics tomorrow while wearing it) , this thing is just awesome and well worth the $.
I've thought about getting a vest to ride with on super hot days, but I can't get past the whole "exposed elbows and shoulders" thing. Eventually I'll have to get something reflective to ride my bike onto base, but that's pretty rare these days, mostly only when I have to pick up friends at the train station, and I don't see me doing that on a bike
It's really meant to be worn under your riding jacket (/leathers) , personally i would never ride with just the vest on but it sure beats the hell out of that piece of foam in your jacket they call a back protector (better than nothing but still a joke)
I use the knox aegis back protecor and their chest guard under my leathers on track days. Best investment I made to my safety gear. Yes, it's hot as hell but I ride better knowing I'm wearing proper protective gear.