#color_Black / Black with Spectron 4 lens

#color_White / Brown with Spectron 3 Polarized lens

#color_Army / Gray with Spectron 4 Polarized HD lens

Slack Cover

Name: Slack Cover
Brand: Julbo Eyewear
Price: 99.95 USD
Availability: InStock
Rating: 4.6 (10 reviews)

$99.95

4.6

Rated 4.6 out of 5 stars

10 Reviews

SKU: J5871214

Color:Black / Black with Spectron 4 lens

Variant

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.

Specs & Features

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.

Size & Fit

Size: Large

Sunglass Width (mm): 138

Lens Height (mm): 45

Bridge Distance (mm): 20

Temple Length (mm): 135

Base: 6

Lens Width (mm): 52

Age: Adult

Weight: 22 g

Having trouble deciding which sunglasses or helmets are right for you, we can help!

Our NEW Eyewear Finders can help you determine the perfect sunglasses or goggles. You can find them HERE.

If you want to learn more about our REACTIV Photochromic Lens Technology you can find information on REACTIV sunglass lenses HERE.

You can find additional information about our REACTIV goggle lenses HERE.

For general questions check out our FAQ's.

For any additional questions you can contact our customer service at info@julbousa.com.

Ward sunglasses on a table with a short description of the Julbo Spectron sunglasses

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.

4.6

Rated 4.6 out of 5 stars

Based on 10 reviews

Total 5 star reviews: 7 Total 4 star reviews: 2 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0

90%would recommend this product

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10 reviews

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JC
Jordan C.
Verified Reviewer
I recommend this product
Rated 5 out of 5 stars
Yesterday
Favorite New Sunglasses
The Slack Cover is my go-to for everything from hiking to skiing. The removable bridge and side shields make them ultra-adaptable, and the Grip Tech temples ensure they never slip. I also love that they’re made from bio-sourced materials—sustainable and high-performance!
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JT
Jim T.
Verified Reviewer
Rated 3 out of 5 stars
Yesterday
Great protection, but side shields feel loose
The removable shields are a great idea for added protection, but I found them a bit loose after repeated use. The Grip Tech temples keep the sunglasses secure, which is great, but I wish the shields locked in a little more firmly.
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Julbo Eyewear
15 seconds ago
Hi Jim,

Thank you for taking the time to share your feedback. We're sorry to hear that you're experiencing issues with the side shields on your Slack Cover sunglasses.

We want to make sure you have the best experience with our products, so we encourage you to reach out to our Customer Service team at info@julbousa.com. They’ll be happy to assist you and help find the best solution.

We appreciate your support and look forward to resolving this for you.

Best regards,
The Julbo Team
CW
Chad W.
Verified Reviewer
I recommend this product
Rated 5 out of 5 stars
Yesterday
Customizable & Super Comfy
I love how I can customize these with the removable side and bridge shields. Whether I’m on a windy trail run or just wearing them casually, I can adapt them to my needs. The Grip Tech temples ensure they stay put, even when I’m sweating. A fantastic all-around pair of sunglasses!
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ET
Elizabeth T.
Verified Buyer
I recommend this product
Rated 5 out of 5 stars
1 week ago
Love my slacks
I love my sunglasses. I purchased the color option with orange and they r perfect. I use them in snow conditions and daily drivers. My first trip out in the backcountry of the Adirondacks they did fog up (backcountry skiing Marcy) - I was disappointed. Once I took my first brake at Marcy dam and then continued they never fogged again!
Absolutely recommend- LOVE THEM!
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GB
Garrett. B.
Verified Reviewer
I recommend this product
Rated 4 out of 5 stars
1 week ago
Great All-Arounders
I bought these to wear around town but I've found myself wearing them everywhere and for everything. Comfy fit, and look great with the side shields on. The polarized lens works great in the bright sun. Never thought I would fall in love with a pair of sunglasses, thanks Julbo!
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