Take strong eco-strides in Simple Shoes, $20 to $120, made with recycled carpet padding, tires and wool, plus hemp, organic cotton and 100 percent post-consumer recycled paper. They’re as stylish (we like the understated, red men's D-Solve sneaker, $64.95, or the women's Satire Print sneaker, $54.95) as they are sustainable; at endless.com.