Foldable Design: The headband of the earmuffs is foldable, and the height after folding is only about 12 cm (4.72 inches), which is easy to carry and store. Comfortable to Wear: The earphones are made of ABS, sponge and leather materials, which effectively reduce the overall weight of the earmuffs while ensuring strength, and will not feel tired even if worn for a long time. Effective Noise Reduction: Ear defenders allows a reasonable attenuation of about 21dB NRR, which can effectively reduce environmental noise. Strong Adaptability: The unfolded height is about 22 cm (8.66 inches), which is suitable for most people's head shape, ensuring stability and comfort of wearing. Wide Application: It is made of sturdy ABS material, which can withstand certain impact and wear, and is suitable for use in harsh environments such as industrial plants.