Features of the Julbo Alpha Goggle Air Flow : Venting incorporated into the frame for good air circulation to prevent formation of fogging. Anatomic frame : Cuts on the frame for more flexibility. Anti-fog coating : The inner surface of the lens has an additional anti-fog coating. Cosy Soft Foam : Single Density foam for comfort and a soft-touch layer for softer contact with skin. Cylindrical double lens Frameless construction Full silicone strap : Strap lined with a silicone strip for perfect grip. GlAre Control : An anti-glAre filter with low polarization (57% polarization) to combat glAre while remaining sufficiently light to allow good visibility. Makes terrain easier to read in both good and bad weather. Overstrap : Offset strap for compatibility with all types of helmet. Polycarbonate lens Symmetrical adjustment : Two loops either side of the strap for symmetrical adjustment in the blink of an eye.