I have two helmets. One is a $10 Wally World Bell and the other is a $40 LBS Giro. The cheap helmet is not adjustable. You stick these pads in to fit when you first get the helmet. They can't be removed. The Giro has an adjustable fitting system and the pads can be removed for cleaning. I use the Giro about 75% of the time. I can't see spending more than $50 on a helmet.
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Wish I didn't know now what I didn't know then. - Bob Seger