Extra soft and super sleek, The Sleep Mask features a molded interior shape that gives your eyes plenty of room. It includes a hidden pocket for easy ear plug storage, and folds into itself for easy packing. Additionally, our fabric uses 37.5® thermoregulating technology to personalize climate control. If you get hot, 37.5 active particles help to cool you down. If you get cold, these same particles work to warm you up.