Welcome to my shop, I hope that my goggles can provide you with satisfactory help during your exercise. I wish you a and happy day! To prolong the anti-fog effect of swimming goggles, do not wipe the lens with your hand Precautions: Manual measurement will have some errors which is normal. All product images are taken in kind, due to the difference between light and display, there will be some colors, which is normal Low-profile strap with ergonomic split and interior texture provides for a secure and stable fit