Bought one of these for my trip out to Colorado last spring. I know they're designed for the M-Frame, but they do work with the Crosshair, as well. The unobtanium fids a bit differenly, but it still provides grip at the ears and the strap still holds the glasses in place. Used them while rafting and they gripped better when wet.

such a cool and ultimatly useful for high impact sports

wow , what an exceptional , functional item this is , when you go out and do some serious "head-shake" sport, this along with the M frame is the choice of all oakley eyewear !
good for jet-skiing ( i tried ) kite-surfing ( i saw ) and i guess , many other sports

a great accessory.
makes my m frames more secure & gives me peace of mind.

great design & great fit.

I love this thing. I got the old school one for an older MFrame and since I like so much, I got me the newer version