Waterproof Materials: Made of high quality polypropylene,use to hold multiple sheets of check-size paper for easy viewing, perfectly to sort, organize and storage files, documents, posters, receipt, coupon, cards. The document holder size is 10.23*5.11*0.2 inches, suitable for check size files & other small items, holds no less than 100 sheets of paper. Great for teachers, accountants, architects or lawyers use,the file folder is more better to protect the files and easy to clean,and the simple design keeps things looking clean and professional.