The Mideer Jigsaw Puzzle Mat is Designed to protect your in-progress or finished puzzle and let you move the puzzle without causing it to break apart. It is optimized for easy use and convenience with 3 steps: Firstly inflate the tube, then roll up the puzzle mat and tie up the included bands. That's it! Pretty easy right?! The grey color contributes to the sharp contrast between the mat and the colorful puzzles. This can improve efficiency and make it easier, especially for kids and the elderly. The spacious design accommodates up to 2000 pieces.