See Grass

Reuse. Regrow. Reimagine.

Recycled Plastic + Grass Fiber + Bio Gas = Sunglasses Reimagined.

Zeal Optics See Grass frames combine 70% recycled plastics and 30% grass fibers in a closed-loop system to create our most sustainable sunglasses yet. This fibrous base is combined with recycled plastics to reuse waste material and keep it out of landfills. See Grass allows us to create beautiful, durable sunglass frames, each of which is unique, while finding alternative uses for what was previously considered trash and byproducts.

See Grass

See Grass is produced at a closed-loop German biorefinery, where fibrous grasses are grown, and mixed with pre-consumer recycled plastics. Powered by a methane turbine that runs on decomposing organic matter, the process creates fertilizer to grow the grasses, without generating any waste.


Reflected light and UV exposure can cause glare, eye fatigue, and sensitivity, all of which disrupt your view of the world around you. All Zeal lenses are polarized and eliminate 99.9% of glare and block 100% of harmful UVA/B/C rays, protecting your eyes against the risk of long-term damage from the sun’s harsh rays.


Ellume Polarized lenses revolutionize the way you see color. Made from Z-Resin, our unique plant-based polymer, these lenses are engineered to be as sustainable as they are technical. Plant-based material creates a high-purity lens for crisper, clearer vision as will reducing environmental impact. More Color, Less Pollution.

an infographic showing the closed-loop process of create Zeal See Grass sunglass frames
a man wearing sunglasses and hat standing in the mountains

"I am so stoked on these new sunglasses from Zeal. They always crush it on the sustainability game, but this line takes it to the next level! I love how they are keeping the environment in mind, but they don’t compromise durability or style. Great job Zeal!"

★★★★★ - Wade G.

Shop Divide
a woman stand up paddle boarding on a mountain lake

"It’s not always easy to incorporate sustainable products into your everyday wear, but with the Aspen See Grass frames - Zeal has done just that! Great fit, lightweight, amazing lenses, and to top it off a low environmental impact! Does it get any better?!"

★★★★★ - Hailey E.

Shop Aspen

Polarized Plant-Based Sunglasses

Follow The Sun