The 3M Peltor Kids Earmuffs are specially designed for younger wearers up to about 7 years old. Comfortable and fun children s ear defenders the 3M Peltor Kids are suitable for smaller head sizes. The 3m Peltor offers consistent level of comfort when worn for long periods. This is because the earmuffs have wide sealing rings, filled with unique combination of fluid and foam. It makes them so soft and comfortable to wear.