Put a record on the turntable and nestle into your beanbag chair. The Grass Roots headphones from iWave have a definite 70s aesthetic that's nostalgic in all the best ways. But don't be fooled, the throwback style cloaks some next generation eco-design. The headphones are said to be made from "reusable, environmentally friendly and recyclable materials." What that means exactly we have no idea, but we're told no trees were harmed in making the handsome wood housing. So that's good. And at $40, the Grass Roots Headphones are a sustainable steal.