Thank you for viewing. ★ These are earplugs also used in ANA's business class amenity kits. ★ High-performance, blocking out noise in airplanes. ★ Made of very soft, special foam. ★ So soft that it won't return to its original shape once crushed. ★ Slowly expands to fit perfectly. ★ Comfortable, allowing for a good night's sleep. ★ Also useful for concentrating on trains, studying, etc. ★ The size is easy to wear, even for women. I will sell these to anyone interested. Thank you.