Moving between woodland and open hillside can change the light repeatedly within a single trail run. Julbo’s ULTIMATE REACTIV eyewear is built around a broad field of view, an adjustable fit and photochromic lens technology.
The ULTIMATE frame features CustomFIT temples, Grip Tech contact material and an adjustable 3D Fit Nose. Julbo lists the frame in a large fit, with the selected J5464022 version weighing 27g.
Match the lens to the outing
The linked version uses a REACTIV 0–3 lens, with a published visible-light-transmission range of 12–87%. Other ULTIMATE lens variants have different specifications, so the frame name alone is not enough when comparing pairs.
Photochromic lenses change their tint in response to conditions. For a runner, the useful questions concern the actual mix of open ground, shade and time of day, alongside how comfortably the eyewear stays in position during movement.
Try the whole headwear combination
A fitting should include any cap or headband normally worn on the trail. Temple pressure and nose contact can feel different once those items are combined, particularly on a longer outing.
For specialist retailers, explaining the exact lens code is central to the sale. The ULTIMATE name identifies a frame platform, while the chosen REACTIV specification determines the light range. A short fitting and a clear comparison of lens options give the customer more useful information than appearance alone.
See Julbo ULTIMATE REACTIV specifications on the manufacturer’s website. Explore more Trail Running gear and stories on Outdoor Insight.
