Blue painters tape is the most common bed material used in the 3D printing community. Not only is it inexpensive, but it is easy to find and it works well. The tape works best when printing with PLA at standard temperatures. If you choose to use blue painters tape on your bed, you will need to replace the tape once it rips, breaks, or no longer allows prints to stick to it. Usually the tape comes off easily from the print bed but, if it does not, it is safe to use an adhesive remover. Once the bed is clean from your old tape, we recommend using 2 or 3-inch tape on the bed. You will need to lay the pieces of tape across the bed while not overlapping or having too much space between them. Once the tape is on the bed, we recommend running through calibration steps again as the tape can sometimes be thicker.
Here is a great step-by-step instruction: