Julbo

Frequently Asked Questions

• What makes Julbo's REACTIV photochromic lenses different from other photochromic systems?

  REACTIV lenses have the photochromic molecules embedded in the lens material rather than as a surface coating, which preserves performance over the life of the lens. They’re engineered for a very wide light-range and fast reaction time, and each REACTIV lens undergoes a lengthy manufacturing process to deliver optical quality close to mineral glass.
• How do Julbo's lens materials compare—Alti Arc mineral, Spectron, and polycarbonate/Trivex options?

  Alti Arc is Julbo’s mineral glass option made for mountaineering, offering superior scratch resistance and optical clarity but with greater weight and fragility than polymers. Spectron lenses (Spectron 3, Spectron 3 HD, Spectron 4 HD) are lightweight, impact-resistant polyester options aimed at value and sporty use. Polycarbonate or Trivex-based Julbo lenses trade a bit of glass-like clarity for much better impact resistance and lower weight, which is preferable for dynamic activities.
• What frame and fit features does Julbo use to keep sunglasses stable and comfortable during activity?

  Julbo integrates Air Link Temples for lowered bounce and shock absorption, CustomFit Temples with a metal core and Grip Tech rubber for personalized shaping, and a 3D Nose with a bendable metal core and Grip Tech covering for secure hold. Many models use semi‑frameless, panoramic lenses and front venting to increase airflow and helmet-compatible shapes for alpine or snow use.
• How does Julbo reduce glare and handle rapidly changing light in alpine, marine, and snow environments?

  Julbo offers polarized options (around 80% polarization in some lenses) to cut reflected glare from snow and water while still allowing screen visibility, and REACTIV photochromic lenses to adapt quickly to changing light conditions. Flash mirror finishes and specific tints further tune visible light transmission for bright or mixed conditions, while front venting and lens shapes help manage fogging.
• Does Julbo make sunglasses for kids and different face shapes?

  Yes, Julbo produces models sized for men, women, and children, with children’s glasses featuring curved temples, Grip Tech Junior materials, and hypoallergenic components to suit younger facial morphology. Many adult models also offer adjustable 3D noses, bendable CustomFit temples, and frame shapes designed to accommodate a range of face sizes and helmet setups.