evo.com | Julbo Sunglasses > Discover the perfect blend of retro style and mountain-ready performance with the Julbo Slack Cover Sunglasses, featuring removable shields that transform their look in seconds for whatever adventure calls. The distinctive double-bridge design delivers head-turning aesthetics while Spectron lens options enhance contrast and reduce eye strain during long days under bright skies. Removable Protection Easily customize your Slack with removable bridge and side shields making them the most protective and customizable sunglasses on the market. Bio-Sourced Rilsan Made with materials derived from castor beans, this frame is lighter, stronger and more environmentally friendly than frames made of traditional plastic. This product may contain chemicals known to the State of California to cause cancer, or birth defects, or other reproductive harm. Spectron 4 (Select Colorways) Cat. 4 polycarbonate lens (visible light transmission rate: 5%) with an anti-reflective coating: improves visual comfort by eliminating stray reflections. And a flash finish: improves filtration of visible light by applying a mirror effect to the lens. Blocks sunlight and increases the filter effect. Recommended for sports exposed to conditions with strong glare. 100% UV Protection Julbo lenses block 100% of UV a, b, & c rays. | Julbo Slack Cover Sunglasses 2026 in Blue | Plastic