Slack Cover
Slack was already a vibe, but Slack Cover takes it up a notch—or a few thousand feet. These lightweight, super-comfy sunglasses have removable side and bridge shields that transform them from retro-cool to summit-ready in seconds. The bold double-bridge design keeps you looking sharp, while the SPECTRON HD Polarized lens option boosts contrast, amps up color, and cuts eye strain, so you’re comfortable all day long. Whether you’re hitting high-altitude trails or just rocking the vintage look, Slack Cover has your back—and your eyes.
- Removable Protection: Easily customize your Slack with removable bridge and side shields making them the most protective and customizable sunglasses on the market.
-
Grip Tech Temples: Soft, rubberized temples offer comfort and perfect grip.
- Curved Temples: Ergonomic profile is comfortable on the face and grips the head.
- 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.
- 100% UV Protection: Julbo lenses block 100% of UV a, b, & c rays.
Choose options
- Removable Protection: Easily customize your Slack with removable bridge and side shields making them the most protective and customizable sunglasses on the market.
-
Grip Tech Temples: Soft, rubberized temples offer comfort and perfect grip.
- Curved Temples: Ergonomic profile is comfortable on the face and grips the head.
- 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.
- 100% UV Protection: Julbo lenses block 100% of UV a, b, & c rays.
- Removable Protection: Easily customize your Slack with removable bridge and side shields making them the most protective and customizable sunglasses on the market.
-
Grip Tech Temples: Soft, rubberized temples offer comfort and perfect grip.
- Curved Temples: Ergonomic profile is comfortable on the face and grips the head.
- 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.
- 100% UV Protection: Julbo lenses block 100% of UV a, b, & c rays.
FAQ
REACTIV lenses are photochromic and adjust to changing light conditions by getting lighter or darker depending on the amount of UV light present. REACTIV lenses are made of NXT (Trivex), which has the clarity of glass and exceptional durability and impact resistance.
SPECTRON lenses are not photochromic and will not lighten or darken. SPECTRON lenses are made of polycarbonate, which is shatter resistant, and are a versatile lens suitable for all types of activities.
Proper cleaning helps prevent damage and extends the life of your lenses. Avoid using solvents, chemical cleaners, paper products, gloves, or anything abrasive, as these can scratch the lens. Scratches are not covered under our lifetime warranty, so be sure to clean and store your eyewear carefully to keep it in top shape.
CLEANING SUNGLASSES
1. Gently wash the frame and lens in soapy water.
2. Rinse the frame and lens thoroughly with clean water.
3. Wipe away moisture with a soft microfiber cloth or non-abrasive material. Let the glasses air-dry.
4. Store glasses in their microfiber case/pouch. Avoid direct sunlight or leaving next to a heat source.
Please visit our RETURNS page to find out more and initiate a return.
- NWNoah W.Rated 3 out of 5 stars1 week agoMiddle Bridge Piece Falls Out
I really like these glasses. They are comfortable, clear, and perfect for yard work. Unfortunately, after just three days of use, the middle bridge piece popped out and got lost. I checked the spare parts page, but that piece isn’t available yet, and customer service told me I’d have to buy a whole new pair just to replace it.
The glasses still work, but without the bridge piece, they don’t fit as securely and lose some coverage. I expected better support or replacement options for such a key part. If they offered that piece separately, this would easily be a 5-star product.
- JRJesse R.Verified BuyerRated 5 out of 5 stars2 months agoGreat coverage
I like the fit, coverage and weight of these shades. I wore them while teaching a mountaineering course in the Rockies. The Julbo Slack Cover provided exceptional coverage in the bright, snowy environment. Julbo also had great customer service when I needed them to change my order last minute. Two thumbs up to the crew at Julbo
- JHJesse H.Verified BuyerRated 5 out of 5 stars1 week agoChecks the boxes
Is cheap enough, but does the job of more expensive eyeware. Lenses holding up good. The fit is a nice middle ground between aviators and raybans or pure circle lenses (aviators make me look like a grasshopper). I like that the shields come off for easy cleaning. The protective case is a plus. The mirror lenses are nice, and while they seem a little bright at first, they were dark enough to handle an extremely hot, bright, bluebird day on the mountain, in full sun, surrounded by nothing but bright reflecting snow in all directions. Didn't ever think in the moment that they weren't dark enough. So it checks all the boxes for me.
- MVMichael V.Verified BuyerRated 5 out of 5 stars1 month agoGreat high alpine protection
Spent a few long days spring skiing with the Slack Covers and had no eye fatigue afterwards, the sun shielding contoured perfectly to my face and kept out snow glare.
- JDJennifer D.Verified BuyerRated 5 out of 5 stars1 month agoGreat glacier glasses
Finally a pair of glacier glasses that stay on my head. These are a definite if other glasses don’t fit your face.
