| http://www.w3.org/ns/prov#value | - A helmet according to claim 1, further comprising ear cups removably attached to said helmet, said ear cups having a system for retention to the helmet, said system including two tabs split down the middle, the split meeting with a hole at a center of each tab, and said tabs on said ear cups engaging two pegs on each side of the said outer helmet shell to lock the ear cups into place.
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