The Apollo SV-1 is a low-volume mask with a soft silicone skirt, tempered-glass viewing lens and easy-adjust buckles. It is a useful model to compare when looking for a medium-to-large facial fit for snorkelling or scuba diving.
Features and benefits
- Low-volume profile keeps the mask compact against the face.
- Soft silicone skirt offers flexible contact around the cheeks and forehead.
- Tempered glass provides the viewing window.
- Adjustable buckles let you refine strap tension before entering the water.
Technical Specs
| Specification | Details |
|---|---|
| Model | Apollo SV-1 |
| Profile | Low volume |
| Lens material | Tempered glass |
| Skirt and strap | Silicone |
| Adjustment | Easy-adjust buckles |
| Fit guide | Medium–large faces |
Mask fit and specifications
| Face-fit profile | Medium–large faces |
|---|
The medium–large label is a guide only. Check the seal and comfort on your own face; do not overtighten the strap to compensate for a poor fit.
Choosing your fit
Keep hair away from the sealing edge and place the mask against your face with light strap tension. Check that the skirt sits evenly around your forehead and cheeks, with comfortable room around the nose. The frame or lens should not press against your face. Visit our Hallam team if you would like help comparing shapes.
Care and storage
Rinse in fresh water after use, including the buckles, then let the mask dry in the shade. Store it in a protective case without crushing the skirt. Follow the supplied instructions for lens preparation and anti-fog treatment, especially for coated lenses. Avoid abrasive cleaners, toothpaste and flame treatment.

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