Tusa Paragon S Single Lens Scuba Diving Mask

The Paragon S is the single-window version — one uninterrupted lens for the widest, most open field of view. The standard Paragon is a two-window mask, and its key advantage is that corrective/replacement lenses are available for it (diopters from -1.5 to -6.0), which the single-window Paragon S cannot take. Both share the same reinforced TRI-MIX frame, the same fitting dimensions, and the same premium CrystalView optical glass with UV and anti-reflective coatings. Choose the Paragon S for the view, the Paragon if you need prescription lenses.

The Paragon S uses TUSA's CrystalView optical glass with the UV 420 Lens Treatment — a hardened, multi-layer anti-reflective and ultraviolet coating. In plain terms: it blocks harmful UV, cuts glare and reflections for a clearer image, and the coating is hardened for durability. It is paired with TUSA's Freedom Technology frame and Fit II skirt for a low-volume, comfortable seal.

Hold the mask against your face without using the strap, look slightly down, and inhale gently through your nose; a well-fitting mask holds itself in place for a few seconds. Check that the skirt seals all the way around without digging into the nose bridge, and that there are no gaps at the temples or above the upper lip. A mustache can break the seal even on an otherwise well-fitting mask.

New masks carry a residue on the inside of the lens left over from manufacturing, and defog cannot stick to it, so the mask fogs until that film is removed. The standard pre-treatment is to scrub the inside of the lens with a mild abrasive cleaner or a dedicated mask prep and rinse thoroughly, repeating if it still fogs. Follow the mask manufacturer's instructions, particularly on coated or mirrored lenses.

Apply defog to a dry lens before the dive, spread it over the whole inner surface, then rinse briefly with water just before you put the mask on. Fogging happens when warm moist air meets a cooler lens, so a clean lens with a thin surfactant film is the fix. Keep sunscreen off your fingers before handling the inside of the lens, because that film fogs badly and is hard to remove.

Dive mask lenses should be tempered safety glass because it resists scratching and, if it ever does break, fractures into blunt granules rather than sharp shards next to your eyes. Untempered or plastic lenses scratch easily and can craze, which is why tempered glass is standard on scuba masks. Look for the tempered marking etched on the lens.

Yes, prescription options are widely available, usually as masks fitted with stock corrective lenses in set diopter steps, custom-ground lenses installed in compatible frames, or bonded lenses added to an existing lens. Not every mask frame accepts replacement lenses, so check compatibility before you buy the frame. An optician or a dive shop can help translate your glasses prescription into a mask lens choice.

Rinse it in fresh water after each dive day and let it dry away from direct sunlight, avoiding anything abrasive on the treated inner lens. Store it in a rigid mask box so the skirt is never compressed or creased, since a set crease in the skirt is a permanent leak. Keep silicone skirts away from petroleum products and prolonged UV, both of which yellow and harden them.

Not tight at all in the usual sense, because over-tightening is the most common cause of both leaks and headaches; a hard-pulled strap distorts the skirt and lifts the seal off your face. The strap should sit high on the back of your head and be just firm enough to keep the mask from shifting. If you need it cranked down to stop a leak, the mask does not fit your face.

The Paragon is the premium two-window mask (with the Paragon S as its single-window version), built on the reinforced TRI-MIX frame with CrystalView optical glass and the UV 420 lens treatment. The Freedom HD (M1001) is a single-lens mask with a bigger frame and a 265cc internal volume at 270g; the Freedom Elite (M1003) is the compact low-volume option at 220cc and 233g with a tempered single lens. One deciding factor: corrective lenses are only available for TUSA's two-window masks — including the Paragon — not for the Freedom HD, Freedom Elite or the single-window Paragon S.

They use the same premium lens package — CrystalView optical glass with anti-reflective and UV 420 treatments — in two different frames. The Paragon S is a single-window mask on TUSA's reinforced TRI-MIX frame. The Zensee Pro (M1010S) is TUSA's frameless one-window mask: lower volume at 215cc, lighter at 214g, and made in a single size that adapts to a wide range of face shapes through the 3D SYNQ fitting ring and Swift Buckle 3D. Neither takes corrective lenses.