Foldable and Portable design. Lightweight ear defenders feature a foldable style as the ear cups collapse into the headband. Allow to take it anywhere. Adopted eco-friendly and non-toxic materials. Our ear muff allows durability for safe and constant use and prevents from noise, This ear muffs is passive noise isolating and no batteries needed. Suitable for almost everyone to use! The products we sell with adjustable headband design and suitable for different head type people use, designed with retractable stainless steel at the end of headband, the ear defenders can be adjusted to fit all sizes. Comfortable and enjoyable. The padded ear cushion and adjustable headband can give you and your kids a comfortable wearing experience It is easy to fold and unfold which makes it fully adjustable for kids through adults while enhancing noise blocking ability. Designed with noise-dampening sponge, soft ear cushions and solid ABS ear cups, this ear defender we sell can achieve NRR 20dB (= SNR 26dB)noise reduction. Protect your child’s hearing by blocking out the noise of sports events, animals barking, snore, concerts, Construction site, Disneyland, airplane flights.