Make sure the O'ring is on the groove of mask
Connection part. It will avoid leaking problem.
Please adjust elastic band well to avoid no leaking
Especially chin and forehead part.
Clean mask with fresh water after use every time.
Put the mask in warm fresh water for some minutes
After sea snorkel to avoid corrosion.
Avoid to use soap or detergents to make visibility well.
Keep dry after use.
Don't place the mask under the sunlight directly.
Don't use towel to clean the face lens, glasses cloth Is better.
Don't place face lens touch the hard surface.