1. Anti-Fog & s - 2X anti-fog performance. More solid & durable . Silicone-backed non-slip strap , keeping strap in place on any helmet. The ski & snowboard goggles in this year for youth women & men . 2. OTG(Over the glasses) - OTG design that lets you wear your glasses under the goggles . Fit your glasses up to 5.5in wide ,1.65in tall . Great Helmet Compatible - Silicone-backed non-slip extra long widening high density elastic strap , keeping strap in place on any helmet. Not the cheap small strap without silicone-backed. 3. Performance Double Layer Lens - Cool full real Revo mirror coating reflective lens , anti-fog , UV protection ; solid , anti-scratch , & impact-resistance ,the lens enhanced by CSHT Super-hardening Technology; great optical clarity. The inner lens made by Italy with pro long-lasting anti fog materials. Designed for ULTIMATE PERFORMANCE. Not the cheap single lens without anti-fog function . 4. Great Helmet Compatibility - Silicone-backed non-slip extra long widening high density elastic strap, keeping strap in place on any helmets without falling. Very easy to adjust to the length fits the Not the cheap small strap without silicone-backed.