The Hollis M3 is a low-volume twin-lens mask with low-iron tempered glass and a soft silicone skirt. Its four-way buckle system lets you adjust the strap position while keeping the mask compact for diving and snorkelling.
Features and benefits
- Low-iron tempered-glass lenses reduce the green tint associated with conventional glass.
- The twin-window, low-volume shape keeps the lenses close to the face.
- A flexible silicone skirt and four-way buckles help you settle the fit.
- Choose a black or white frame with a black skirt, subject to availability.
- Compatible Hollis M3 negative corrective lenses are available separately.
Technical Specs
| Specification | Details |
|---|---|
| Lens layout | Twin low-iron tempered-glass lenses |
| Skirt | Silicone |
| Adjustment | Four-way buckle system |
| Fit | Low-volume design; check individual seal and nose clearance |
| Corrective options | Model-specific Hollis M3 lenses; sold separately |
Choosing the fit
Hold the mask gently against your face with the strap out of the way. Keep hair clear of the silicone skirt and check the seal, nose clearance and pressure around your brow and cheeks. Use only light strap tension: tightening the strap cannot correct an unsuitable skirt shape. If you are buying a gift, ask our Hallam team about fitting before choosing by appearance alone.
Care and storage
Rinse in fresh water, dry in the shade and protect the lens in a case. Follow the supplied cleaning instructions and use only a suitable anti-fog treatment. Avoid toothpaste, abrasive cleaners and flame treatments, especially on plastic or coated lenses. Check the skirt and buckles before use.

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