How has the biodegradability been tested? What certifications or proof do you have to show they are biodegradable?
Our Biodegradable Briefs been tested at Royal Melbourne Institute of Technology (RMIT) using the ISO 11721-1:2001, Biodegradable Test. RMIT Is a globally recognized institute that performs research and testing through the School of Fashion and Textiles.
After 9 weeks of biodegradation the underwear had begun partial biodegradation. The main fabric of the brief - ™ and Merino wool - had clear signs of degradation with holes from microorganisms present in the soil. The gusset’s first layer, Merino wool had begun degrading, the middle layers of bamboo terry and the waterproof layer had not yet begun degrading at 9 weeks based on a visual test.
Biodegradability test determines the resistance of to microorganisms present in the soil. The ISO standard states the specific soil composition, water holding capacity and temperature that should be used to simulate environmental conditions for biodegradation. By burying separate fabric samples and the full biodegradable underwear, RMIT was able to determine the trajectory of degradation over time by measuring the strength and weight loss of the fabrics and visual observation.
The waist and leg elastics are a combination of enhanced biodegradation Amni-Soul Eco polyamide yarn and a small percentage of elastane. Their special composition allows bacteria in landfills to digest them, biodegrading into organic matter in about three to five years, unlike other fibers that take decades to decompose. Further information on their testing can be found here.
Our waterproof Thermoplastic Polyurethane (TPU) layer is tested to degrade in 3 – 5 years. Further information on the Green Material can be found here.