Features 1、This earmuffs is made from high quality ABS and sponge and it is comfortable to wear 2、The head‑band of earmuffs is foldable so you can keep it in your bag for convenient storage 3、There are two colors of cup for these earmuffs and you can choose the color you like more 4、The material and design of the earmuff allows for a reasonable attenuation of roughly 21dB NRR 5、This earmuffs is great to use for ear protection during working in industrial plant, etc Specification Description: This earmuffs is designed to cover a person's ears for hearing protection during practice or industry plant working. It consists of a head-band that fits over the top of the head, and a cup at each end, to cover the external ears. Earmuffs protect the wearer from extreme noises. The protection comes from acoustic sponge which absorbs sound waves and reduces the amplitude of the waves. Features: This earmuffs is made from high quality ABS and sponge and it is comfortable to wear. The head-band of earmuffs is foldable so you can keep it in your bag for convenient storage. There are two colors of cup for these earmuffs and you can choose the color you like more. The material and design of the earmuff allows for a reasonable attenuation of roughly 21dB NRR. This earmuffs is great to use for ear protection during working in industrial plant, etc. Specifications: Material: ABS, sponge/cortex Unfold Height: Approx. 22cm / 8.66" Fold Height: Approx. 12cm / 4.72" Cup Color: Black, Brownish Green(Optional) NRR: 21dB Quantity: 1 Package Includes: 1 x Earmuffs Package List