Suitable for travel or shift workers: Helps 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. Made from high-quality fabric. The band on the mask can be easily adjusted to fit your head (instructions included). Ensure the seal between the cup and the ear is secure. If you have long or curly hair, place the cup under the hair as much as possible. Like all earmuffs, thick hair between the earmuffs and the ears may allow some sound to pass through. Ideal for front and back sleepers—also suitable for meditation (sitting upright) or quick naps (lying down). Specification: Black, 2 pieces (with earplugs)