Polycarbonate (PC) frame Polycarbonate lens Anti-Fog Coating coating SAFE & COMFORTABLE: Kids safety first. The boys' and girls' snowboard goggles feature a soft TPU frame and impact resistant PC lens that provide extra safety in case of fall or crash. The breathable soft sponge protects the eye area and has excellent sweat absorption function. Different color ski goggles for children provide a natural and smooth ventilation system, bring the fresh air. ABOUT FIT AND LENS OPTION: Dizywiee snow ski goggles generally fit over 5 years old to early kids and men and women. These snowboard goggles are fit for sunny and cloudy days, higher VLT value for dark condition while lower VLT for sunny days. Never separate from skiing because of the unsuitable goggles, find your special ski goggles. NO GLARE & UV PROTECTION: Spherical mirrored lens is loaded with features to offer periphral view and distortion-free clarity. The mirror coating can prevent the harmful light and glare, while the lens material ensures UV400 protection. The balanced light transmittance makes it suitable for various winter sports, like skiing, skating, climbing motorcycling, cycling, skydiving, bungee jumping, playing shooting games and snowball fights. ANTI-FOG & CLEAR VISION: Advanced anti-fog lens, the inner lens made by with long-lasting anti-fog materials and high performance hydrophilic coating, professional ventilation system can reduce fogging and optimize the flowing air over the inside of the lens.The outer lens with super-hardening technology can improve anti-scratch and impact resistant performance. Crystal view on the slope when skiing and snowboarding. OTG AND HELMET COMPATIBLE: Dizywiee X400 youth ski goggles are designed the adjustable elastic head strap which is change the size, fits most of people, and children can operate by themselves. The long sturdy and adjustable strap is compatible with any ski helmet.