Cozy wool trainer with upgraded cushioning for effortless on-the-go comfort. Dark Grey (Light Grey Sole) New Lightweight, bouncy, and wildly comfortable, Allbirds shoes make any outing feel effortless. Slip in, lace up, or slide them on and enjoy the comfy support Size tip: If you have wide feet or prefer a roomier fit, we suggest going up a half size. For extra wide feet, go up a whole size.