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 mesh and TPU low-top trainers100% mesh; contrast 100% TPULace-up fasteningExclusive design, almond closed toe, low-top design, bio-based and FSC-certified components, traction-oriented outsole unitWipe with a clean, dry clothUpper: 100% mesh; contrast 100% TPULining: 100% woolSole: 100% rubber