The Ion 4 mask uses the same basic design of the original Ion mask and offers all the of the same great features including the lightweight frame, twin lens design that accepts minus and plus corrective lenses, 100% liquid silicone skirt and webbing/neoprene mask strap but the frame has been modified at the side so that side view panels could be added to provide increase peripheral vision.
- Same great fit and style as the Ion with side windows for increased peripheral vision
- Sturdy lightweight frame
- Low volume design for wide field-of-view and easy clearing
- May be easily fitted with optical lenses in minus and plus corrections
- 100% liquid silicone for comfort and long-life
- Easy adjusting buckles for convenience
- Neoprene Comfort Strap included
Corrective lenses are available in -1.5 to -8.0 in 0.5 increments and +1.75 to +2.75 in 0.5 increments.
Advice on how to prevent your mask from fogging can be found here- How to Pre-Treat a Dive and Snorkel Mask