ELEVENTH HOUR ESSENTIAL BLACK SUNGLASSES At Eleventh Hour, a woman owned company independently operated in NJ, each pair of sunglasses is handmade (with love) from the highest quality materials. Acetate frames, stainless steel metal, and polarized lenses. They use a material called acetate, which is primarily made up of natural cotton and wood fibers. Unlike most other plastics, acetate is environment-friendly since they are made up of natural renewable materials that decompose overtime. The Essential Sunglasses are the classic silhouette.