Create a custom accessory with the Mariner Pro optical kit. Featuring lens connectors, this self-assembling prescription kit can be made in just 15 seconds with Mariner Pro optical lenses - available for purchase separately. Dynamic sliders provide quick and efficient adjustment while a low-profile split strap offers a secure and stable fit, so you can focus on your swim. Featuring 3 different sized nose bridges, this easy-to-adjust kit fits a wide range of face shapes.