So im in the market for a new helmet it must have the inner sun shade (i am wearing perscription glasses now) and i was wondering if any of you guys or gals have looked at Kabuto Kamui this is my 1st choice i need light weight having some neck issues . How many years is a helmet good for i heard every 5 years you should replace your helmet due to the structural integrity decreases. Also i thought that the more expensive a helmet is the better it protects you well i was wrong from what i have read it depends on what you are doing example street riding or track racing . Track helmets being snell rated etc and street helmets being Dot. So what helmet are you rocking and pros and cons on the inner sun shade and ratings on your skid lid Dot and snell and whatever else is out there.