The A4 size envelope comes in six colors: clear blue, clear red, clear pink, clear green, and clear yellow. It can be perfectly organized to solve the problem of file clutter, and good storage of paper materials so that the desktop is tidier. Each envelope has a pocket for business cards or other labels to help you identify and locate the documents you need. Folders can be used to collect document material, keep order, save space, prevent water, scratches, dust, friction, etc., and keep away from crimp, damage, smear, and loss. Very easy to turn on and off. Made of high-quality plastic, thick, wear-resistant, waterproof, reusable, and durable. Translucent, easy to see inside, quick to find things, and helps with storage.