I don't have any zippers on my ear pieces with my Smith. One ear piece was glued shut and I needed to do a little surgery. Zippers?Not sure why anyone is even discussing the helmet zippers to hold ear discs in. Mine stay open and I haven't touched my helmet zippers in 7+ years on my older Smith helmets and on my newer ones, I opened the zippers and haven't touched them since. The strap and ear flaps hold the chips in even in the most extreme conditions including drop offs. I've never ever had a Chip fall out.
Pop em out, takes 1 sec......and they are out of the helmet and ready to charge.