This is elastic cord for masks. It includes 5m rolls of round elastic, 4m rolls of round elastic, and flat elastic for the remaining pieces. This elastic is gentle on the skin and designed to be comfortable on the ears. - Material: Polyester, Nylon - Application: Mask elastic - Country of Manufacture: Japan, Taiwan For safety, I opened the white elastic and checked the contents. There was slight discoloration on the top portion. (Please see photos 6 and 7.) Please be aware of this. m(_ _)m There are no pets. Please understand that these items are stored at home. Please refrain from purchasing if you are particularly sensitive to this. m(_ _)m Thank you for looking.