Felt Material:Files folders are made of qualified felt, which features anti-corrosion, anti-tear, and wear-resistant; With a snap to avoid missing files, to protect your file, bills, paper, and receipt from losing and keep it organized. Ideal Size:The size of the felt folder (33cm x 23cm) is slightly bigger than A4. It means you can put more documents inside. Document wallet with snap button makes put documents in and out of the wallet much easier. Assorted Colours:Come in 2 different colours. Folders are very convenient for students to store courses' notes. You can put each courses' notes in a different file, and use a different color for each course so you can instantly grab the notes you want. Convenience and Security:Lightweight make the expanding file folder convenient to carry, could put it into the backpack, briefcase, bag, also can hold it on your hand. Design with snap button to keep documents secure. Widly ApplicabilityThe file bag is suitable for commercial occasions, office documents, household documents, job interviews, school, and so on. Great organizer for home, school, and office.