The size of "Night Cat Sleep Mask" is comfortable to use. The length of the elastic band offers a fine fit and prevents over-tightness or discomfort. Cleaning them is also very simple. Just hand wash, wring dry and hang them out in the sun! Each set of goggles comes with a beige-colored cotton pouch for convenient storage and carriage. Whether you are traveling, catching up on your sleep on a plane, or taking a nap during your lunch breaks, these sets of masks are your ideal companions!