Chase Ergonomics 90609 Body Glove Bio 459 Series Eyewear with Silver Metallic Frame / Dark Lenses feature sporty, sculpted semi-rimless frames. The softer temple ends and nose pads gently grip for secure, comfortable wearability. Stylish, ANSI Z87.1-2010 compliant Body Glove Bio 459 Series glasses will help meet your corporate and personal environmental goals. These glasses are designed to be converted to humus (balances soil pH, helps keep soils aerated) and methane in anaerobic) or CO2 (in aerobic conditions) in a small fraction of the time it takes untreated plastics to degrade to smaller bits of plastic. The eyewear starts to degrade only after it"s buried in a landfill or similar environment; the Bio 459 Series frames and lenses are made using a treated polycarbonate material that, when buried in a landfill, attracts microbes which digest the plastic. Our polycarbonate safety glasses were found to biodegrade an average of 12.4-Percent in the first 165 days under conditions that simulate a biologically-active landfill using the ASTM D5511 test. Each pair of glasses come to you packaged in a biodegradable pouch made with corn starch. Actual biodegration rates vary in landfills according to moisture level. Present tests at 45-Percent solids content are representative of wetter landfills, such as the Pacific northwest ot southeastern US. ASTM D5511 specifies "This test method may also resemble some onditions in biologically active landfills where the gas generated is recovered and biogas production is even actively promoted."