The Treeanie Ribbed is super comfortable, looks great and keeps your ears cozy and warm even on cold days. The seamless knitted cut has also been designed so that no waste is produced. In addition to cotton, these colorful treeanies also use Polylana®, a sustainable alternative to acrylic that uses less water and energy than conventional acrylic and makes the treeanie even softer - it's not without reason that our treeanies are among the bestsellers!