We bring one of our most comfortable and eco-conscious experiences ever to boat shoes. Naturally comfortable GreenStride™ soles are made of 75% renewable sugar cane and rubber from trees. The EVA-blend foam midsole adds on more cushiony comfort. As part of our Earthkeepers® Edition, this style is made of Regenerative Leather. This leather comes from farms whose practices help pull carbon from the air and store it in the soil where it actually does some good.