Cressi Prisma UV 420 Lens Mask

Quick answer: The Cressi Prisma is a mask built around one problem: fog. Cressi's patented Fog-Stop system cools the warm, damp air you breathe out through your nose before it reaches the lens. Add a UV 420 lens, a fold-flat build and optical lens options, and it's a smart choice for anyone tired of spitting and rinsing.

Why it's worth a look

Soft heat-exchanger panels on the outside of the skirt act like radiators, bringing the air inside the mask closer to water temperature and catching moisture before it fogs the lens. The micro-adjust buckle attaches at a soft point on the frame, so tightening the strap doesn't warp the skirt, a common cause of slow leaks. Two frame materials and a soft skirt let the whole mask fold flat into a BCD or cargo pocket as a spare. If you wear glasses, the Prisma accepts corrective lenses for both nearsighted and farsighted prescriptions.

What you get

• Patented Fog-Stop anti-fogging system
• UV 420 lens treatment
• Micro-adjust buckle mounted to a soft frame point
• Fold-flat construction for easy packing
• Compatible with negative and positive optical lenses

Before you buy

Hold it to your face without the strap and inhale gently through your nose. It should seal without the strap doing the work. Wear glasses? Read Can You Dive With Glasses? Your Best Options. More options: Masks for Wider Faces & Better Fit.