Our merino beanies are knit from 100% Italian merino wool leftovers. The knit rib construction is designed to help retain the shape of the hat without the addition of plastic/ spandex. Since they are knit from all natural materials, stretching is normal and expected with normal wear. To restore your beanie's shape, simply machine wash your beanie on a delicate cold cycle and lay flat to dry. We recommend protecting your beanie by washing it inside a mesh bag to protect it from sharp objects in the wash.