Wood has been a component of high-end audio equipment for years due to its excellent acoustic characteristics, so it's no surprise that it has made it's way to everyday equipment flaunting green-desirable specs like PVC-free, plastic-free construction. But there is more than wood materials that make these gadgets environmentally conscious: recycled material packaging, consideration for carbon footprint, electronics recycling programs, and support for green activism...these are all as much music to our ears as the tunes enjoyed via the earphones themselves.The House of Marley is the newest of the companies offering eco-friendly audio equipment. All the materials are chosen with sustainability and quality in mind. With a large range of products and charitable connections, this is definitely a company with a goal to help the planet and sound good while doing it. Earphones start at $29.99 for their entry level, Smile Jamaica earphones and cap out with the $99.99 Zion model (full-size headphones are priced up to $299.99). Vers Audio has been busy making great sounding eco audio gear its mission since 2007. Along with donating to the Arbor Day Foundation, Vers even plants 100 trees for every one they use! That's looking out for your ears and the Earth, with earphones priced at a very reasonable $49.99 for the Vers 1E models. Thinksound is company built on simplicity and low environmental impact. While they only offer earphones at the moment, their commitment to audio quality and eco-footprint is something to take notice of when looking for your new earbuds, notably sustainably sourced woods and PVC-free cables. Prices start at $44.99 up to $99.99, with a trade-in/recycling program which can save you 15%-25% off a purchase.