What the heck is this for?

This isn't .NET related, programming related, but it's weird.  I post here for myself so I can look back on this stuff and find out what I found interesting, odd, worth noting, etc.  So, what the heck would I need with this? http://www.oakley.com/ostore/accessories/medusa/

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Disclaimer: The opinions expressed herein are my own personal opinions and do not represent my employer’s view in any way.