The mirror is a small, optically precise reflective element built directly into the lower-outer corner of the polycarbonate lens. To check behind, tilt your eyes down 10–15 degrees — your head stays still. After a few rides it becomes as natural as glancing at a cycling computer.

About the size of a thumbnail. It sits in the corner of your peripheral vision so it doesn't obstruct your forward view, yet still gives a wide enough field of view to see riders and vehicles approaching from behind.

The mirror fogs and clears at the same rate as the rest of the lens. In high-humidity conditions you can use any anti-fog spray that's safe for polycarbonate. The wraparound frames on The View also include vents that minimise fogging during high-effort rides.

Yes. The mirror is mounted on a precision housing that lets you fine-tune the angle to match your head position and riding posture. Set it once for your usual position and it stays put.

Single-mirror models (left or right) are standard for cycling and running. Dual-mirror models have a mirror on both sides of the lens — designed mainly for rowing where awareness on both sides is critical. Most cyclists pick a single mirror on the side that matches the road they ride on.

The View is a full sport wraparound frame for cycling, running, and rowing — maximum coverage, widest lens choice. The Classic is a lifestyle frame that looks like everyday glasses but performs like sport eyewear — best for commuters and runners who want a less aggressive look. The Clip is a rear-view mirror that clips onto the glasses you already wear — perfect if you already wear prescription or premium sunglasses.

M145 (145 mm temple width) fits most adult faces. Pick S140 (140 mm) if you have a narrower face or prefer a tighter, more secure fit. The View Sharp comes in M145 only – the shape of the Sharp lens also fits many smaller faces well. Replacement lenses are size-specific: an S140 lens only fits an S140 frame, and an M145 lens only fits an M145 frame. Replacement mirrors fit both sizes.

Yes. Temple arms on The View and The Classic are designed to sit comfortably under standard cycling, running, and rowing helmets without pressure points. Most riders wear theirs over the helmet straps with no issue.

If you want to keep wearing your own glasses, choose The Clip – it clips the rearview mirror onto the glasses you already wear. The View and The Classic can't be worn over other glasses. For The View there's an optional Rx insert frame that sits behind the lens: buy it in the same size as your frame, and your local optician fits your prescription lenses in it. We don't make prescription lenses ourselves.

High-Contrast Smoke — most versatile, great for medium-to-bright daylight. Polarized Smoke — best for harsh sun and glare-heavy conditions (essential for rowing). Photochromic 0–2 / 0–3 — adapts automatically to changing light. Clear — for night, dawn, dusk. Reflective (Red, Blue, Green) — bold style with full UV protection. All lenses are UV400.

Yes — every TriEye lens is UV400, which means 100% protection against UVA and UVB up to 400 nm. The same protection you'd find in premium sport sunglasses.

Yes. Replacement lenses for The View are sold individually in every colour and mirror configuration. The mirror ships with the lens — the housing in the frame is permanent. View lenses fit every View frame generation – View Sport, The View Original, View Air and The View Sharp – as long as the size matches (an S140 lens for an S140 frame, M145 for M145). Sharp mirrors only fit Sharp. See which View you have.

Worldwide, to over 40 countries. Standard delivery takes 3–14 business days. Free shipping on orders over $69 USD (or the local equivalent). Outside the US, local taxes and import duties are included at checkout – no surprise charges on delivery. In the US, sales tax is added at checkout.

30 days from delivery. Return the product in its original packaging for a refund, minus a flat $10 USD for the prepaid return shipping label. Exchanges are free: if you want another size, mirror side, lens or model, we cover the return shipping. If your item arrived defective, damaged, or incorrect, the return is free of charge. Start a return at trieye.com/pages/help.

2 years from purchase, covering manufacturing, material, or design defects. Normal wear, drops, and impact damage aren't covered — but replacement lenses, mirrors, and parts are usually available so you can get back on the road.

Visa, Mastercard, American Express, Apple Pay, Google Pay, PayPal, and Klarna. All payments are processed securely by Shopify Payments (PCI-DSS compliant).

Use the included microfibre cloth. For smudges, use a lens spray or mild soap and water. Avoid paper towels, alcohol-based cleaners, and dry wiping — these can scratch polycarbonate over time.

Yes. Many TriEye customers run on shared roads where a head-check is unsafe — the eye-tilt glance gives full rear awareness without breaking stride. The Classic is the most popular running frame; The View works well for trail and high-pace road running.

Yes — and dual-mirror models are designed specifically for rowing. With a mirror on each side of the lens you can see the course ahead from a forward-facing rowing position, no head-turn needed. Polarized lenses cut glare from the water.