Using the Trekmates Polar Gecko Choob is a breeze. You can easily adjust it to wear as a facemask, beanie hat, headband, balaclava, bandana, or scarf according to your needs. Just stretch it and wrap it around your neck, head, or face in the style you like. When it comes to maintenance, since it's machine - washable, you can simply throw it in the washing machine on a gentle cycle. There aren't any special requirements for drying, but air - drying is a good option to keep it in good shape. As for sizing, it's one - size - fits - all, so you don't have to worry about getting the right fit. Just enjoy the comfort and versatility it offers.