Lightweight thermoplastic polyurethane frame conforms perfectly to any face shape while remaining resilient in the ever-changing mountain temperatures Hypoallergenic dual layered face foam provides a sealed fit that protects your little one from the elements while remaining soft to the touch Dual-sided strap adjustment system ensures a snug fit that is specially tailored for smaller head sizes 100% UV400 protected dual layered spherical lens protects from sun's radiation while providing great peripheral vision Stratus anti fogscratch dual lens tech utilize frame vents to create a thermal layer that ensures a view that is free of obstructions and lens damage