Corded Detachable "COMFORT-FIT" Reusable Earplugs | 100 Pairs | Dynamic Meets ANSI S3.19-1974 Regulation & Canadian Class A(L) Standards NRR 25 dB Bright Blue - with cord, 1 pair per small reusable box, 100 pair per box Highly comfortable, noise absorbent, reusable, detachable and safe - the new "COMFORT-FIT DETECT" is all of these. These reusable earplugs are made of washable plastic from MEDICAL Industry technology. This product is also made for the food industry. Its bright blue colour makes it easier to detect in production areas and it is reusable, making it more economical.