BETTER VISION ~ Wide Polycarbonate Lenses with Anti Fog coating and 100% UV Protection (Cat3 UV400 Standard) for the best 180° field of view. MORE COMFORT ~ Ultra-Soft Silicone Double Seals are designed to expand and contract to hug the unique contours of a swimmer’s face. SUPERIOR ANTI SLIP DESIGN ~ our Split Strap Design has no trouble in ensuring a fixed position of the goggles on the head even during the most vigorous swimming.