Description: The VISION mask is characterized by attractive styling and the strap adjusters are attached directly to the silicone collar of the mask using an elastic connection. This solution reduces the internal volume of the mask and allows the strap to be detached for easier transport. The collar of the VISION mask has a special double seal that significantly reduces the likelihood of water getting inside the mask, and the wide strap, split in the middle, prevents the mask from moving spontaneously and reduces pressure on the head. The QUICK-ADJUST system allows for quick and precise belt adjustment. Highlights: 4mm tempered glass; Split glass; Liquid Silicone (LSR); Easy QUICK-ADJUST strap adjustment system; Small internal volume of the mask obtained thanks to the modern attachment of the movable strap holder to the mask collar; negative correction from -1.0 to -8.0 and positive from +1.75 to +2.75 diopters; Packaging: damage-resistant cassette. Purchasing a mask with lenses: If you are interested in purchasing an OPTIC PRO mask with corrective lenses, please first add the mask to your cart and then add positive or negative corrective lenses as a separate product. If corrections of different values are to be installed in the mask, please specify in the order notes which glass is to be mounted on the right and which on the left.