Bio Phone Case. This case is made from an innovative polymer that’s 100% bio-based, mixed with bamboo filler. It’s flexible, protective and with clean lines, rounded edges and a super slim profile, you’ll barely notice this case. But don’t worry, it’s just as protective as our others. This case never needs to end up in landfill. It’s designed to be composted at the end of its life, breaking down with no non-toxic residue in about six months.