Are masks or snorkels the same size for both men and women?

Yes, one size fits all and unisex, so it can be used by both men and women.

Is it better to rub the lens before use?

Glass lens masks generally use toothpaste to remove oil film before use, but UMMY Streamline, Beach and Reef are plastic lenses, so if you rub the lens and your vision will be poor or or foggy.Never rub off.Use without rubbing

The lenses have been scratched.Can I repair or replace lenses?

Once the lens is scratched, it cannot be repaired or replaced.Plastic lenses are very easy to scratch, so please do not follow when handling them.

Do not touch the lens directly.　

Do not wipe the lens with a dry cloth, or tissue.　

Avoid using in shallow water on the beach side, such as when waves (rocks are dangled, so it is easy to hit the lens).

Do not place the mask directly on the beach (where it is in direct contact with sand); Do not put masks or multiple equipment into your bag, etc. Do not use the anti-fog stick paint directly

Need anti-fog?

Streamline and leaf are anti-fog treated, so there is no need to fog.If the mask gets wet with water, the lens inside of the mask becomes nurled due to the coating, so it is not an abnormal phenomenon.(Please avoid direct contact with the lens.Beach needs anti-fogIn rare cases, using a neutral detergent or a strong concentration of anti-fog overseas may cause the anti-fog coating to come off.Do not use detergent or strong anti-fog concentrations.Use anti-fog if the mask becomes less effective with the anti-fog coating.

Can I use it for scuba diving?

Free-dive masks such as streamline, leaf, beach, etc., prioritizes lighter weight compared to scuba diving masks, so strength is not stronger than scuba diving masks.Thus, it is not recommended for scuba diving