Callisto SleepSync™ Color:black white the nylon lenses are

white the nylon lenses are fog-proof and offer HD clarity

This makes it extremely versatile and very suited to road running

Chunky frames in an array of unique colours

These frames are so light

Mostly suited to running but can be used for other sports

Callisto SleepSync™ Color:black white the nylon lenses areMetal frames with super strong light blocking lenses. These red lenses block both wavelengths of light that impact sleep, blue and green. Recommended to be worn two hours before bedtime if using screens, you'll noticeable fall asleep easier. These glasses promote a deeper and more restorative sleep, aiding recovery and increasing morning alertness.