Noise canceling, airplane, noise reduction value 40dB, construction site, work, study, washable, reusable #Click here for Piyoshop product list Feel free to ask questions or comment! Limited items and one-of-a-kind items available! Instant purchase OK! First come, first served! All items are stored at home and/or received from acquaintances. I work and may take some time due to housework and childcare, but I will always respond! There is also a combined purchase function, but please comment if you would like a discount. I will offer a small discount. 〜☆〜＊〜☆〜＊〜☆〜＊〜☆〜＊〜☆〜＊〜 43211-23-100