Tusa tm-5700q dive mask information note: tusa products can only be shipped to the usa and its territories. We cannot ship internationally. Quick adjust springless strap buckle. Low volume for a snug fit. Double feathered-edge crystal silicone skirt. Features 2-window design with wide field of front vision low volume design for snug fit and easy clearing corrective lenses available mc-5000 colors: black, cobalt blue, flash yellow, translucent also available in black silicone tm-5700qb : black technology corrective lens corrective lenses are offered on several styles of masks. This option allows the diver to choose right and left lens powers in both a variety of diopters for maximum flexibility and for a custom fit. Tusa prescription information accepts mc-5000 corrective lenses. For information on picking the right lens powers for your prescription, see faq page on how to read a prescription. Also can be made custom made with the exact prescription lenses made directly into the mask with cr-39 lenses. Direct in prescription is limited to prescription powers of 2.00 To -8.00. Takes about 2 weeks to make.