Aqua Sphere SEAL Swim Masks fitted with clear lenses are designed to provide great visibility when swimming indoors and in low light level situations. The light-weight Plexisol lenses are clear for indoor use and have minimal drag due to the hydrodynamic shape found in all SEALS. Virtually leak-proof with 180-degree visibility. Note: Choice of frame color is ours and is based on our inventory, however, if you would like a particualar color as shown in the photo, please leave us a Feedback after you order and we will do our best to meet your request. Official Swim Mask of the Ironman Triathlon.