The 3M PELTOR Optime II earmuffs have been developed for noisy environments with the highest demands, and are especially suitable for acoustic levels where low and medium frequencies predominate. The pads are filled with an exclusive combination of liquid and foam. The result is an optimal seal with low contact pressure, allowing for pleasant comfort even with prolonged use. 3M personal protective equipment is intended for use in work environments only. This 3M personal protective equipment must be used in accordance with legal regulatory requirements and relevant health and safety standards, as well as all user instructions, warnings, and limitations accompanying each product. It is essential to follow instructions and government regulations regarding the use of each product in order for these products to protect the user. Improper use of personal protective equipment can cause injury, illness, or death. Users should seek advice on health and safety in the workplace from competent personnel in order to select and use products correctly. For more information about the products, visit www.3m.com/es/seguridad