Apollo Bio Metal Mask UV420 lens D Class

Apollo Bio Metal D Class UV420 Mask

The Apollo Bio Metal D Class UV420 is a Japanese-made mask for divers looking for a smaller fit and UV-filtering lenses. Its 95 cc surgical-grade silicone skirt pairs with a hand-polished aluminium frame and coated tempered glass.

Smaller Type-D fit

The D Class is the smaller-fit option, aimed at petite-to-medium adult faces. Its 95 cc skirt has an advanced double-lip edge that spreads contact pressure, while the downward lens angle helps you look towards your equipment. A face-fit check is still the best way to choose your mask.

Japanese craftsmanship and soft silicone

Made in Japan, the precision-machined aluminium-alloy frame is hand-polished and anodised for a rich finish. Its slim construction keeps the mask compact. A soft surgical-grade silicone skirt follows your facial contours, giving you a supple sealing surface for longer sessions in the water.

Tempered glass with a UV420 coating

The lenses combine tempered glass with a multilayer UV420 surface coating. Tempering strengthens the glass; the coating filters ultraviolet and some short-wavelength visible light. The peach-coloured reflection comes from that coating.

• UV420-coated lenses.
• Type-D black silicone skirt.
• Listed internal volume: 95 cc.
• Double-lip skirt design.
• Protective box included.

How the UV420 coating works

Apollo applies a multilayer coating to the tempered-glass lens surface. The coating reduces the light transmitted through the lens in the ultraviolet region and into the short-wavelength violet end of visible light, up to approximately 420 nanometres. This is the meaning of UV420: the number describes the wavelength range the treatment targets.

For diving and snorkelling, this helps reduce UV reaching your eyes through the lenses while you wear the mask. It is a useful feature for surface swimming, where reflected sunlight can add to exposure. Looking after your eyes also means wearing UV-blocking sunglasses on the boat or shore when the mask is off.

The coating produces a peach-coloured surface reflection. Apollo explains that its reflective appearance changes underwater, helping preserve eye contact with your buddy. Rinse away salt and sand before cleaning, and avoid polishing or abrasive products on the coated outer surface.

Care and storage

Rinse with fresh water after each use and flush away sand before touching the lenses. Use a soft cloth only after grit has been removed. Avoid abrasive cleaners or polishing the coated lens surfaces. Let the mask dry out of direct sunlight and store it with the skirt and strap relaxed.

Adjustable split silicone strap

The wide, split rear section spreads contact across the back of your head and helps keep the strap in place. Adjust the side buckles for a secure, comfortable fit without pulling the skirt tight against your face.

Technical specifications

Try the fit against your face. Rinse the lenses before cleaning and avoid abrasive products on the coating.