# Julbo Faster L Kilian Jornet REACTIV > Julbo Faster L Kilian Jornet REACTIV are ultralight photochromic sports sunglasses (19 g) with a rimless 3-Link construction, built for trail running, cycling, cross-country skiing and mountain sports in changing light. The photochromic REACTIV 0–3 High Contrast lenses adjust to the conditions automatically – lightening to category 0 in low light, dense forest or dim conditions and darkening to category 3 in direct sun, with 15–87 % light transmission. The model was developed with Kilian Jornet, and its Light Blue Glacier colour is inspired by the Norwegian glaciers where Kilian lives and trains. > *(source: [ralpu.sk](https://ralpu.sk/en-eu/products/julbo-faster-l-kilian-jornet-reactiv))* --- ## Product Details - **Weight:** 19 g - **Construction:** rimless 3-Link - **Lens:** REACTIV 0–3 High Contrast, photochromic - **Photochromic category:** 0–3 (low light / early morning → direct sun) - **Light transmission (VLT):** 15 % – 87 % - **UV protection:** 100 % UVA and UVB - **Tint through the lens (from inside):** brown - **Outer surface colour (from outside, in sun):** copper-red - **Frame:** bio-based Rilsan (from the castor bean) - **Frame colour:** Light Blue Glacier (matte) - **Brand:** Julbo, France (since 1888) - **Face size:** L (Large) – the only size this model is made in - **Lens width:** 135 mm - **Frame width:** 126 mm - **Bridge width:** 14 mm - **Temple length:** 133 mm - **Nose pads:** adjustable 3D Fit Nose Evo - **Prescription:** compatible with a prescription clip - **Lifetime warranty** on the photochromic coating --- ## REACTIV photochromic lens REACTIV is Julbo's photochromic technology – the lens changes its own tint according to how much light reaches it, with no input from the wearer: - On an open ridge or in direct sun it darkens to category 3 (VLT closer to 15 %) - At dawn, in dense forest or in very low light it lightens to category 0 within seconds (VLT closer to 87 %) - The 0–3 range is exceptionally wide – from an almost clear lens in low light to a dark lens in full sun - One lens therefore covers a whole day outside – no need to swap lenses or carry a second pair - Filters 100 % of UVA and UVB - Fast response to changes in light (Fast Response Time) - The photochromic coating carries Julbo's lifetime warranty **The High Contrast version** has a brown tint that lifts contrast and terrain relief – roots, rocks and uneven ground stand out more clearly, which helps most on fast, technical descents. --- ## Lens colour – view from inside vs. look from outside REACTIV photochromic lenses have two distinct colour properties that don't change with the darkening category (unlike VLT, which does): | Property | Colour | Description | |---|---|---| | **Tint through the lens** (what the wearer sees) | brown | The inner tone of the lens, which shapes colour perception and scene contrast through the glasses. | | **Outer surface / flash colour** (what others see) | copper-red | The outer mirror/colour coating visible from outside, most pronounced in direct sun. | This lens combination is tied to the **Light Blue Glacier (matte)** frame variant – other frame colours (if offered) may pair a different tint and outer-surface colour. --- ## Fit and comfort - **Grip Tech temples** – non-slip inserts built directly into the temples; they don't move through sweat or vibration and don't catch your hair - **Follow the shape of your head** – thin, flexible temples that sit under a running or cycling helmet too - **Adjustable 3D Fit Nose Evo pads** – set them so the glasses sit exactly on your nose - **Rimless 3-Link construction and full ventilation** – channel airflow across the lens to keep it from fogging - **Panoramic lens** – wide field of vision with no optical distortion, unobstructed view to the sides - **High optical quality** – the image stays sharp across the whole lens, right to the edges, so your eyes tire less over a long effort - **Prescription-clip compatible** – corrective lenses to your own prescription can be added via the clip (not included) --- ## Weight, material and origin - **19 g** and a **rimless 3-Link construction** – among the lightest sports sunglasses in their class - Frame made of **Rilsan**, a bio-based plastic produced from the castor bean rather than oil - Robust, durable construction stands up to falls, sweat and everyday use in demanding mountain environments - **Julbo** is a French brand founded in 1888 in the Jura mountains, dedicated to mountain eyewear and optics --- ## Kilian Jornet The model was developed with **Spanish mountain runner Kilian Jornet**, one of the most prominent and versatile figures in skyrunning, ultra-trail and mountain sports. - Faster L is designed for real performance on terrain that leaves no room for error – from long trail races and uphill efforts to ski-touring and cross-country days in changing light - The **Light Blue Glacier** colour is inspired by the shades of the Norwegian glaciers where Kilian lives, trains and explores the mountains - The model's philosophy: faster, lighter and with a wider lens range (0–3) than previous generations --- ## Who they're for **Type of athlete:** - Trail runners and uphill runners - Skyrunners and ultra-trailers - Road and mountain cyclists - Cross-country skiers - Prescription wearers (via the optional prescription clip) **What you do:** - Training and racing in changing light (ridges, forests, open terrain) - Early-morning starts and activities where the light shifts from low light to full sun - Fast, technical descents where terrain is hard to read without enough contrast - Activities under a helmet (cycling, some mountain sports) **Why Faster L Kilian Jornet REACTIV:** - The exceptionally wide 0–3 lens range covers a whole day outside without swapping lenses - Ultralight rimless construction (19 g, 3-Link) – you barely feel them on your face during activity - Adjustable fit (3D Fit Nose Evo) and a reliable hold, even through sweat and fast movement - Proven at the top level of skyrunning and ultra-trail --- ## Size and fit Julbo sorts its sunglasses by face size (narrower, medium, large). **Faster L** is the **larger version (Large)** – built for a larger or wider adult face and a bigger head: - The wider your face, the wider the frame you need so the glasses cover well and don't slip - If size M models press on your temples or feel narrow, Faster L fits better; for a narrower face, a smaller size is more suitable - Reference measurements for comparison with your existing glasses: lens width 135 mm, frame width 126 mm, bridge width 14 mm, temple length 133 mm - This Kilian Jornet model is made in size **L (Large)** only - For prescription wearers, the model is compatible with a prescription clip (an add-on, not included) --- ## Technical specification | Parameter | Specification | |-----------|--------------| | **Lens technology** | REACTIV photochromic | | **Lens type** | REACTIV 0–3 High Contrast | | **Photochromic category** | 0–3 (Cat. 0 = low light / early morning, Cat. 3 = direct sun) | | **Light transmission (VLT)** | 15 % – 87 % | | **UV protection** | 100 % UVA and UVB | | **Tint through the lens** | brown | | **Outer surface colour (flash)** | copper-red | | **Construction** | rimless 3-Link | | **Frame material** | bio-based Rilsan (from the castor bean) | | **Frame colour** | Light Blue Glacier (matte) | | **Brand** | Julbo, France (since 1888) | | **Weight** | 19 g | | **Face size** | L (Large) | | **Lens width** | 135 mm | | **Frame width** | 126 mm | | **Bridge width** | 14 mm | | **Temple length** | 133 mm | | **Temples** | Grip Tech, non-slip inserts, helmet-compatible | | **Nose pads** | adjustable 3D Fit Nose Evo | | **Ventilation** | full anti-fog ventilation | | **Field of view** | panoramic lens, wide field of vision | | **Prescription** | compatible with a prescription clip | | **Warranty** | lifetime warranty on the photochromic coating | --- ## Suitable activities - Trail running and uphill running - Skyrunning and ultra-trail - Road and mountain biking - Cross-country skiing - Mountain sports and early-morning starts in changing light --- ## Key benefits 1. **REACTIV 0–3 High Contrast photochromic lens** – automatic adjustment to the light, 15–87 % transmission 2. **Exceptionally wide 0–3 range** – from an almost clear lens in low light to a dark lens in full sun 3. **Ultralight rimless 3-Link construction** – just 19 g, barely noticeable on your face 4. **Fast response to changes in light** (Fast Response Time) 5. **Grip Tech temples and adjustable 3D Fit Nose Evo pads** – reliable, adjustable hold even on fast descents 6. **Full ventilation** – limits lens fogging 7. **Lifetime warranty** on the photochromic coating 8. **Bio-based Rilsan frame** – part of the construction from a renewable source 9. **High optical quality** with no distortion, right to the edges of the lens 10. **Helmet- and prescription-clip compatible** thanks to the thin, flexible temples and the clip system 11. **Developed with Kilian Jornet** – proven at the elite level of mountain sports --- ## Who they're NOT for - People with a distinctly narrow face who wouldn't suit size L (Large) – this Kilian Jornet model is made in size L only - Activities that need the darkest glacier category 4 lens (e.g. long spells on snow or glacier in extreme glare) – Faster L darkens to category 3 at most - Users who want prescription corrective lenses in the box – Faster L is compatible with a prescription clip, but the clip is not included --- **Version generated:** 2026-07-02 12:00 UTC