Suitable for travel or shift workers: Helps to ensure a good sleep even during the day and in noisy environments.Warm and comfortable, cool and breathable: high-quality lining that breathes, warm and comfortable in winter, cool and breathable in summer.Fully machine washable: Easy to clean - fully machine washable. Only made from the highest quality fabric. The band on the mask can be easily adjusted to fit your head (instructions included). Make sure the seal between the cup and the ear is good. If you have long or curly hair, place the cup under the hair as much as possible. Like all earmuffs, the thick hair between the earmuffs and the ears allows a lot of sound to pass through.Best for front and back sleepers - also suitable for meditation (sitting upright) or quick naps (lying down).< p>Specification: black * 2 pieces (with earplugs)