EFM Eco+ Case Armour with D3O Zero - For iPhone 12 Pro Max 6.7" - Charcoal EFM Eco Case Armour is a completely earth friendly phone case crafted from 85 percent plant based materials and 15 percent repurposed D3O materials in the form of D3O Zero. The all new EFM ECO boasts a tough, slim and durable design that is eco friendly and sustainable. Natural, organic and designed to withstand deterioration, the ECO also comes with 100 percent recyclable packaging, and a portion of your ECO purchase goes directly to Carbon Neutral.