Ultra adventure. These women's waterproof boots come with some serious benefits. First for you, they help keep your feet dry and very comfortable. For Nature, new GreenStride™ soles are made using 75% natural sugar cane and rubber from trees. The leather comes from a tannery rated silver by the Leather Working Group for its environmental practices, and the TimberDry™ linings are made with at least 50% recycled plastic.