Julbo Slack Cover

Julbo Slack Cover

Mountain sunglasses with removable lenses, available in categories 3 and 4.
€94.00

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Availability: In stock & Available in our store

The opinion of Aventure Nordique

The Slack Cover from Jura-based Julbo is a versatile pair of goggles for every occasion. Lightweight and extremely comfortable, these goggles feature a double-bridge frame with bold styling and proven reliability. Its removable shells on the sides and above the nose transform them into a vintage look of high-mountain exploration, while offering maximum protection.


Choice of glass



  • Spectron: Lightweight, economical polycarbonate glass, available in a wide range of colours.

  • Spectron HD: High-definition polycarbonate glass for improved clarity and contrast, with water-repellent treatment.

  • Reactiv: A high-quality photochromic lens, its tint adapts to ambient light in 15 seconds. The lens covers several categories, from 1 to 3 for example.


Glass finish



  • Polarized: Polarising filter that blocks the reflection of light on snow, ice or water (does not allow you to look at a phone screen, camera, etc.).

  • Glare Control: Semi-polarising filter that partially blocks the reflection of light on snow, ice or water (screen compatible).

  • Light Amplifier: Filter that amplifies brightness without compromising UV protection, for overcast skies, shaded areas...

  • High Contrast: Filter that enhances contrast and accentuates relief, for good visibility of the terrain.


Glass category



  • Cat. 0: Light tint filtering 0 to 19% of light, for night-time use.

  • Cat. 1: Light tint filtering 20 to 57% of light, for low light, overcast skies. 

  • Cat. 2: Average tint filtering 58 to 82% of light, in average, cloudless sunshine, except in summer.

  • Cat. 3: Dark tint filters out 82 and 92% of light, the minimum recommended for sunglasses, and provides sufficient protection in strong light conditions (beach, sea, mountains...).

  • Cat. 4: Very dark tint filters out up to 97% of light, for extreme conditions, high mountains on snow or ice.

Points to remember

The Slack Cover is a pair of goggles with a vintage look from the era of the conquest of the summits. Versatile, lightweight and offering maximum protection, it's sure to make you love altitude. Available in category 3 and 4.

Technical details

Manufacturer Julbo
Product name Slack Cover
Model Unisex
Sizes L
Category 3, 4
Weight 25 g
Additional information

Dimensions

  • Frame width: 138 mm
  • Bridge width: 20 mm
  • Temple length: 135 mm
  • Lens width: 52 mm

Included with the glasses

  • Spectron lens: microfibre pouch
  • Reactiv and Spectron HD lenses: microfibre pouch and semi-rigid case

The country of manufacture may differ depending on the type of lens.

Warranty 2 years

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