Majority touts its new Tru Bio product as a particularly sustainable example of wireless earbuds as they (their case included) are made with "eco-biodegradable" materials. They are also rated to deliver quality audio via large drivers (also compostable) and hardware that supports up-to-date Bluetooth connectivity (less so). The Tru Bio buds have an estimated 30 hours of battery life and charge back up with USB type-C.