This thin sleep mask protects users from bright light so that they can nap in comfort while on the go. The special arrangement of the holes allows the user to see through the mask at all times, providing a greater sense of security. The mask’s heat function aids deeper relaxation and is controlled via a dial. The heat has a relaxing effect on the delicate musculature around the eyes, stimulates blood flow and helps to minimise the appearance of dark under-eye circles.