The I/O 7 is one of Smith's most popular goggles, and they are now bringing ChromaPop technology to the lenses. Smith introduced ChromaPop lenses in their sunglasses about two years ago and they were met with rave reviews from outdoor enthusiasts across a wide range of sports and activities. ChromaPop effectively enhances clarity and natural colors to let you see more detail with less eye fatigue. Smith breaks down the benefits into three sections: sharper, easier, and faster, meaning you will see better, with less strain on the eyes, which allows you assess and tackle the mountain quicker. Take your goggles to the next level with Smith I/O 7 replacement lenses. Polarized lenses that protect your eyes from the sun Varied styles for varied weather conditions Smith I/O 7 lenses are quick and easy to change.