To use this backpack, first unzip the main compartment and start loading your loose sleeved trading cards. You can neatly stack them to maximize space. For the playmats, attach them to the playmat straps on the exterior pockets. When carrying the backpack, make sure the straps are adjusted comfortably on your shoulders. As for maintenance, keep it in a dry place to avoid any damage to the cards. If it gets dirty, use a soft cloth and mild soap to clean the exterior. Don't overstuff it to prevent the straps from getting damaged. Enjoy your gaming adventures with this great backpack!