BOLD Flux Performance Sunglasses – MTB, Ski, Run & Lifestyle Eyewear

Flux Fixed Color Sunglasses – Built for Speed, Made to Last

BOLD Flux sunglasses are made for athletes who charge hard and don’t let up. With a bold, fixed-tint lens and a medium-to-large wraparound frame, Flux delivers a wide field of view, full-face coverage, and a secure, no-slip fit that stays locked in through every climb, sprint, and descent.

Whether you're railing singletrack, hammering out gravel miles, or chasing spring snow, these shades are designed to keep up—no lens swapping, no distractions, just reliable clarity and protection.

Key Features:

• Frame Material: TR90 (lightweight, flexible, impact-resistant)

• Lens: Fixed-tint polycarbonate, non-polarized

• Fit: Medium/Large unisex performance wrap

• Lens Tints: Smoke, Red Mirror, Blue Mirror, Silver Mirror (varies by color option)

• Color Options: Black, Red/Black, White, Blue

• Use Cases: Mountain biking, ski touring, trail running, gravel riding, everyday wear

• UV Protection: 100% UVA/UVB protection

All Grip. All Style. No Fuss.

Flux doesn’t mess around. With crisp fixed-tint optics and a frame that fits like a second skin, these sunglasses are ready for whatever’s next—without slowing you down.

Technical specifications

UV protection and certification

What UV400 actually means

UV400 means the lens blocks 100% of ultraviolet light up to 400 nanometres. That covers the whole UV range that reaches the ground, both UVA and UVB. Independent lab testing measured 0.00% transmission across it.

Why UVB matters. UVB is the shorter, higher energy wavelength. Your cornea absorbs almost all of it, which is why the damage shows up fast. A day on snow without protection can give you photokeratitis, which is sunburn of the cornea. It feels like grit in your eyes and usually arrives six to twelve hours after exposure, often in the middle of the night. Long term, UVB is associated with pterygium, a fleshy growth across the white of the eye that skiers and surfers get, and with skin cancer on the thin skin of the eyelids.

Why UVA matters. UVA is the longer wavelength and it does not stop at the cornea. It passes through to the lens inside your eye and on to the retina. You feel nothing at the time, which is the problem. The damage accumulates over decades and is linked to cataracts and to age related macular degeneration. UVA is also present all day, all year, and it passes through cloud, so overcast days are not safe days.

Why it matters more on snow and at altitude. Fresh snow reflects up to 80% of UV straight back at your face, so you take it from above and below. UV intensity also climbs roughly 10% for every 1,000 feet you gain. A bluebird day at 10,000 feet on snow is one of the harshest UV environments most people ever stand in.

One more thing worth knowing. A dark lens with no UV protection is worse for your eyes than no sunglasses at all. The tint makes your pupils open wider, so more UV gets in. That is why the lab number matters and the tint does not tell you anything on its own.

What these standards mean

ANSI Z80.3:2018. The United States standard for non prescription sunglasses. It checks UV blocking, that colours still look natural through the lens, and that you can correctly recognise red, amber and green traffic signals.

ISO 12312-1:2022. The international standard for sunglass filters. It sets the filter category, verifies UV performance, and confirms whether the lens is safe for road use.

AS/NZS 1067.1:2016. The Australian and New Zealand standard, widely regarded as among the strictest in the world for sun protection. It is the one that measures UV blocking all the way out to 400 nanometres, which is where the UV400 claim comes from.

FDA 21 CFR 801.410. The United States Food and Drug Administration requirement for impact resistant eyewear. Every lens is drop ball tested. Impact resistant does not mean unbreakable, but it means the lens is built to resist shattering rather than breaking into fragments near your eyes.