This document bag is made of 18C thickness Propene Polymer. The filing folders for A4 size paper, can clip 1 - 50 pieces of paper. Translucent cover protects your papers and shows your title page clearly, easy to find the required documents and information. This file folder set fits for different occasions, businessmen can use them to hold documents or files, and students can use them to hold test papers. Custom logo is welcome.