Trainers made from merino wool, sugar cane, eucalyptus fibres and even discarded crab shells? No, it's not magic, it's Allbirds. Sustainability and comfort are the focus of the San Francisco-based brand. The former is achieved by its use of natural materials and innovative processes which don't wreak havoc on the Earth, while the latter is proven by the cloud-like soles, temperature-regulating wool composition and thousands of five-star reviews.Allbirds organic-cotton canvas low-top trainers100% organic cottonLace-up fasteningLow top, closed almond toe, logo at sides, contrast sole, lightweight, breathableWipe with a clean, dry clothUpper: 100% organic cottonLining: 100% organic cottonSole: 100% rubber