HUUB Aphotic Photochromatic goggles allow you to experience maximum visibility in all kinds of weather on race day. Whether it's dark or bright, indoors or outdoors, this photochromatic technology adjusts to light or dark environments allowing maximum visibility making them the perfect choice for indoor or outdoor swimming.  Photochromatic lenses aid sighting and allow you to move around obstacles and other swimmers even when you swim into the sun, or with your back to the sun. These incredible lenses adjust perfectly and take only 160 seconds to go from clear to dark delivering ultimate performance for every turn of every buoy. Special patented photochromic dyes cause the lens to activate, or darken when exposed to ultraviolet rays from sunlight. When the UV light diminishes, the lenses fade back. The Aphotic swim goggle is the first step from HUUB to 'Goggle perfection' suitable for use indoors and outdoors and in any light condition. For a great swim, you need a comfortable fit and the ability to see as much as possible while having as much light as possible blocked out when the sun is high, or water reflection is optimal. Designed to fit the face perfectly with a density of silicone and TPR matched to create a perfect fit and a feather-like feel even on the most interesting of facial profiles.