ECO Eyewear is a carbon negative brand that makes stylish, sustainable eyewear from bio-based materials, such as castor seed oil and recycled plastic, and recycled metal. The brand is known for its "One Frame, One Tree" program, which plants a tree for every frame purchased, allowing them to surpass carbon neutrality. Their products include prescription glasses, sunglasses, and clip-ons, with sustainable practices extending to their packaging and accessories.