What Does UV400 Mean?

UV400 describes protection against ultraviolet radiation up to 400 nanometers. It covers UVA and UVB radiation. Tint and mirror color describe how the lens looks.

Rider wearing black shield sunglasses on a bright outdoor day
Made for outdoor days. These Shield Cycling Sunglasses combine UV400 protection with a broad curved lens and an open lower edge.

What protection does UV400 offer?

The U.S. Food and Drug Administration recommends choosing sunglasses labeled UV400 or 100% UV protection. Its consumer guidance explains that these sunglasses block more than 99% of UVA and UVB radiation.

When choosing sunglasses, consider UV protection alongside the frame shape, fit and lens features that suit your plans.

UV protection is different from lens appearance

Look for UV400 or 100% UV protection when choosing your pair. A dark tint changes the lens appearance, and a mirror finish adds a reflective look. Choose the color you like while checking UV protection separately.

Lens feature What it describes
UV400 UV protection up to 400 nm
Polarized A feature that helps reduce reflected glare
Photochromic A tint that changes in response to UV exposure
Tint or mirror color The lens's visible appearance

A pair can combine UV400 with other lens features. Polarized lenses help reduce reflected glare, while photochromic lenses change tint with UV exposure. The depth and speed of a photochromic tint change vary with the lens and conditions.

Two looks with UV400 protection

Black half-rim cycling sunglasses with a neutral gray shield lens
Neutral gray. A neutral gray shield with a black frame offers a simple, understated look.
Clear lilac half-rim cycling sunglasses with a purple mirror shield lens
Purple mirror. A purple mirror shield with a clear lilac frame adds color to the same broad silhouette.

Choose your look

Both of these Shield Cycling Sunglasses options offer UV400 protection. Choose the frame and lens color you prefer, then compare any other lens features you want.

What else should you compare?

Look at the frame dimensions, lens shape and coverage as well as UV protection. Check how the frame sits at your nose and temples. For riding or running, consider the fit with the helmet or cap you normally wear.

Explore our UV400 sunglasses or compare polarized, photochromic and tinted lenses.

Read the FDA's sunglasses and sun-protection guidance for more advice on choosing sunglasses.

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