Arbor's designers crafted the Upgrade Full-Zip Hooded Sweatshirt with two things in mind: function and the environment. Well, there may have been other things on their mindswe aren't psychics. But, we do know that the material is made using viscose from renewable bamboo, and the zipper pull is made with reclaimed wood from Arbor's snowboard and skateboard shop. Thumbholes and a no-chafing zipper guard bump up your comfort so your body will feel just as good as your planet-friendly brain.