Smith 4D MAG S

The Smith 4D MAG S Replacement Lens is a dedicated spare optic for the 4D MAG S goggle, designed to keep your eyewear system performing at its best. As a direct replacement, it maintains the original fit and coverage of the goggle while restoring optical clarity after scratches or wear.

Engineered for all-day use in alpine environments, this lens blocks 100% of UVA and UVB radiation, giving you reliable protection against harmful sunlight. The straightforward swap design lets you refresh your goggles without replacing the entire frame, so you can get back on the mountain quickly.