Pro Ears ReVO passive ear muffs for smaller heads and ears. These NRR 25 passive ear muffs are designed from the ground up to fit smaller heads. All the same features you expect from Pro Ears passive hearing protection, but they provide a better fit for children and smaller adults-this means better hearing protection. Everyones head and ear size is different. One size does not fit all and Pro Ears ReVO can make the difference for you!The ReVO Advantage is the great comfort and noise attenuation designed for a proper fit on youth and smaller adult heads.When total situational awareness is not required a great pair of passive ear muffs are the most effective means to protect your hearing. Ear plugs can be effective only if they are properly inserted in the ear. Very often, due to discomfort or improper training the ear plug does not provide the level of protection advertised. Many children find ear plugs uncomfortable. They may even be a swallowing hazard for very young children. A comfortable, well designed pair of ear muffs can protect your hearing for years. Proper fitting is essential to adequate protection. Most ear muffs are designed to fit the majority of the adult population. The size and shape of the headband and ear seals impact the fit if the headband is too big , the cups will not have the correct compression on the head and may hang too low. If the ear seals are too large, gaps will allow sound waves to reach the ear. If all the manufacturer does is shrink the size of the cup to fit a childs head, the noise attenuation will decrease. The ReVO is a revolutionary approach to solving these issues.