ProView – Julbo Frequency Performance Sunglasses Review

In April, I spent a month splitboarding across the French, Italian, and Swiss Alps with the Julbo Frequency sunglasses in tow. From long hut approaches to quick tram-access laps, these sunglasses came everywhere with me. After 30 intensive days of testing, they quickly became my go-to pair for backcountry snowboarding, mountain biking, and hiking thanks to their excellent photochromic performance, impressive lens clarity, and standout fit.

Fit & Comfort

The Frequency sunglasses fit my face exceptionally well. As a small woman, I often struggle to find sunglasses that don’t slide down, sit awkwardly on my cheeks, or simply overwhelm my face. I never had any of these issues with the Frequency sunglasses. As a result, however, I wouldn’t recommend the Frequency glasses to those with large faces.

They’re also impressively lightweight. Many performance sunglasses can feel bulky or fatiguing after a full day outside, but these remained comfortable even during ten-plus-hour days in the mountains. The Grip Tech temple arms and nose piece feel flexible yet secure, keeping the glasses stable while mountain biking, hiking, and snowboarding. I’m also prone to headaches from overly tight temple arms, and these never caused discomfort, even with daily use over the course of a month. Plus, they fit nicely under both my ski and bike helmet, with no uncomfortable pressure points.

Look & Style

Many speed-style sunglasses lean heavily into a performance-first aesthetic, but the Frequency strikes a nice balance between performance and casual wearability. I appreciated that they looked just as natural walking around Chamonix or La Grave as they did skinning uphill or riding downhill. The mirrored lens, sleek shape, and relatively low-profile fit give them a modern look without feeling overly technical.

Features & Performance

Julbo is known for its standout lens quality and top-tier Reactiv photochromic technology, and the Frequency delivers on both fronts. Optical quality was excellent, thanks to crisp, high-quality lenses. I loved that the Reactiv category 1–3 photochromic lenses automatically adjust to changing light conditions, with a visible light transmission (VLT) range of 75% to 17%. Over the course of the trip, I wore these glasses from dawn through dusk on cloudless days and flat light conditions. Because the lenses adjust automatically, there’s no need to change them throughout the day.

Most of the time, the tint adjustment felt spot-on. In very low light, the lenses occasionally remained a bit darker than I wanted, while on extremely bright glacier days I found myself wishing for category 4 protection. Still, the 1–3 range handled the vast majority of conditions well and makes these an especially versatile choice for mixed-weather mountain missions. As a result, while I would recommend these for mid-winter and early spring ski touring, running, biking, and hiking, they wouldn’t be my first choice for a multi-day glacier trip.

Ventilation was another standout feature of the Frequency glasses. The small vent channels along the top of the frame and the open side design provided consistent airflow and helped prevent fogging during climbs and warm spring conditions—an issue I’ve experienced with other large, performance sunglasses and glacier glasses.

Durability

Although the Frequency has a lightweight, somewhat delicate feel in hand, it held up impressively well during testing. Over the course of a month, these sunglasses were tossed into my hut pack, left on rental car dashboards, and hauled across Europe on planes, trains, and buses without issue. Despite the abuse, they showed no meaningful signs of wear. That said, they are still lightweight performance sunglasses, so I wouldn’t recommend crushing them at the bottom of a pack without a case. Still, I was impressed with how well they held up (notably, the temple arm of my old Smith Bobcats broke during plane transit on a ski trip in South America).

The Final Word

For smaller-faced athletes looking for a high-performance pair of photochromic speed shades, the Julbo Frequency is an excellent option. The combination of lightweight comfort, secure fit, fog-free ventilation, and excellent optical clarity made these sunglasses a good choice in most conditions.

While dedicated backcountry skiers spending long days on glaciers may prefer a darker category 4 option, the Frequency’s versatile 1–3 photochromic lens handled nearly every condition I encountered during a month in the Alps. For runners and bikers who run and ride in sunny conditions, these glasses are an excellent, all-around choice.

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