Customise your Oceanpro Optik mask to match your diving kit and stand out from the crowd, by adding your preferred coloured lens retainers. Snaps in firm ensuring a perfect seal and cab be changed out at any time. Fitting highly recommended by trained retail shop staff. Colours available include white, teal, blue and black and can be mixed and matched with the Optik Mask comfort mask strap for further customisation of your mask.