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GIRO SAGENHey rider, here is a summary of everything you need to know about the GIRO SAGEN MASK .
EXPANSION VIEW (EXV) TECHNOLOGY - Perfected in Giro's test lab in Scotts Valley, California, this revolutionary new frame design offers unprecedented peripheral vision. We started with a helmet-compatible goggle, then reduced the edge of the frame and added frameless zones to optimize the spherical lens ensuri