From Castor Oil To Coastal Cool: Decoding SOEK's Plant-Based Eyewear Materials

February 11, 2026

Sustainable fashion has never felt more relevant, and recycled sunglasses in Australia are taking the charge. At SOEK™, sustainability is built into every design decision, from materials to manufacturing, proving that eco-conscious choices can still look endlessly stylish.

In this guide, written by the team at SOEK™, we’re breaking down the plant-based materials behind our eyewear, so you know exactly what makes your sunnies a more thoughtful choice.

FSC-certified timber: nature-inspired and beautifully constructed

At SOEK™, our wooden sunglasses are made using 100% sustainable timber from Forest Stewardship Council (FSC) certified suppliers. The FSC is a globally recognised organisation that promotes responsible forest management, ensuring timber is harvested in ways that protect biodiversity and support long-term forest health. 

We’re proud to be FSC-certified ourselves, and we only partner with material suppliers who meet the same rigorous standards. These natural materials are renewable, free from toxic elements and handcrafted to create lightweight yet durable frames. Each pair features its own unique grain and character, giving you a one-of-a-kind look while helping keep your footprint lighter on the planet.

Castor seed oil: a natural alternative to plastic

Castor seed oil is one of the innovative materials used in SOEK™’s plant-based range. Sourced from the castor plant, this eco-friendly material requires minimal water and no pesticides to grow.

The process begins by harvesting and drying castor beans until they split open. The seeds are then pressed to extract the oil, which is used as a bio-based alternative to traditional plastics.

Castor seed oil frames are strong and incredibly comfortable, proof that sustainable materials can still deliver on performance and style. Better yet, these frames are biodegradable, helping close the loop on waste and environmental impact.

Bio-acetate: plant-powered and premium

For those who love a polished, modern feel, SOEK™’s bio-acetate frames are a game changer. Crafted from sustainably sourced wood pulp and cotton, bio-acetate is a renewable, plant-based material that offers a conscious alternative to traditional acetate. With its distinct makeup, bio-acetate allows for resilient yet feather-light designs, delivering lasting comfort. 

Designed for everyday wear

Whether you're heading out for a sunny road trip or running everyday errands, SOEK™ sunglasses go the distance. Every pair features lightweight frames and spring-loaded hinges designed to flex to your face shape, offering a snug, secure fit without the pinch.

All of our recycled sunglasses in Australia include polarised UV400 lenses, providing 100% UVA and UVB protection. They also meet Category 3 High Protection standards, ideal for bright, harsh conditions like those found across Australia. For added peace of mind, all lenses undergo independent testing by a NATA-accredited Calibrations and Testing laboratory.

Shop chic plant-based eyewear at SOEK™

Making sustainable fashion choices shouldn’t feel like a chore, and with SOEK™, it isn’t. As an Australian sunglasses brand, we keep things simple: good-looking sunnies made from recycled and responsibly sourced materials that actually fit your lifestyle. From materials to practices, the brand is constantly exploring new ways to improve and reduce its impact, all while staying true to its design-driven roots.

With so many colours, lens tints and wood finishes to choose from, you’ll find a pair for every face shape, mood and last-minute weekend adventure. Shop the collection and lock eyes with the pair you’ll reach for day after day.