Millenium Reactiv 2-4 Sunglasses

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A dependable, adaptable pair of sunglasses blending mountain-ready protection with everyday comfort and understated style.

Julbo says: 

The Julbo MILLENIUM is an effortless blend of high mountain protection, robust construction and progressive design codes. The removable leather side shields offer long-lasting efficient shelter from intense sunlight and extreme conditions, even on the highest summits. The thin, lightweight temples are designed to feel comfortable all day, with integrated anti-slip pads to keep your shades in one place even when you don’t.

Our Verdict

The Julbo Millenium Reactiv 2-4 sunglasses are a well-rounded option for those needing reliable eye protection in bright and changeable conditions. The photochromic lenses adjust smoothly from category 2 to 4, giving dependable coverage from shaded valleys to exposed snowfields. I’ve found the transition fast enough that I rarely notice it happening, which makes them great for variable mountain light. The removable leather side shields are a classic touch, offering extra protection in high-glare environments without feeling bulky.

At 28 grams, they’re light enough to wear all day without discomfort. I like the soft, grippy nose pads and temples—they hold the glasses securely in place even when moving quickly or sweating. The frame feels sturdy without being heavy, and I appreciate that it’s made from bio-sourced material. I’ve worn them in a mix of settings, and while they excel at higher altitudes, they’re stylish and subtle enough for daily use too.

– Reviewed by Ultralight Outdoor Gear

Features

• Front – Removable Leather Side Shields
• Temples – Grip Tech Temples, Curved Temples
• Bridge – Grip Nose

Specifications

• Weighs: 28g
• Frame: SHINY TRANSLUCENT – Shiny Translucent Gray / Khaki / Beige
• Lenses: REACTIV 2-4
• Category: Photochromic 2 4
• VLT: 7-35%
• Frame width: 138mm
• Bridge width: 21mm
• Temple length: 140mm
• Lens width: 55mm

Material & Construction

• Lenses: REACTIV 2-4

Help & advice:

• Choosing Sunglasses
• Choosing Sunglasses – UV, LVT and Lens Categories explained