Bolle Product #: 20813 * All Bolle goggles are engineered with the latest helmet designs in mind so the fit is smooth. * All Bolle lenses block harmful UVA/UVB rays up to 400 nanometers. * Bolle Equalizer technology uses a waterproof, breathable vent to eliminate any moisture. The result is distortion free vision and no fogging at any altitude. * Swinging outrigger to maintain perfect fit with helmets.