So you are looking for a fully biodegradable case for your iPhone 13? The Raptic Terrain iPhone case has you covered. It has a clear polycarbonate back and offers 10ft protection. It has a grippy rubber frame to absorb impact. It is also Qi wireless charging compatible.
According to the company, these cases are manufactured in the USA to shorten the supply chain and minimize carbon footprint. It also biodegraded 22.5% in under 365 days in lab testing.[HT]