The iNature iPhone case is more than likely the most environmentally friendly smartphone case on the market. The iNature case is 100 percent biodegradable and is made using Apinat, an Italian bio-plastic.
Just because the case is biodegradable does not mean that it will wear out when wet or set on the ground. In order for the iNature iPhone case to break down, it must be left in a compostable environment. Within 180 days, the case will have broken down by about 90 percent. In addition to their smartphone cover, iNature also has a biodegradable headphone organizer dubbed the BioRolly. Both items are inexpensive -- the case comes in at $20 and the BioRolly at $8 -- and both are good for the environment.