The most important thing is to make sure that if the bean bags get wet, they have enough time to thoroughly dry. The best way to do this is to place them against a fence or wall so that they can drain.
Even though the bean bags use high-quality materials, they may get dirty or stained if you spill something on them. If this happens, you should try spot cleaning them, or if that fails, rinse them with water.
If you will not be using the bean bags for a while, it may be a good idea to store them away from the rain and sun. This way your cool outdoor furniture will stay clean, dry, and looking like new. For more information here are five easy tips on how to clean your beanbags. And five ways to keep your bean bag looking new.
Also, sweat can be reasonably damaging to the fabric of your bean bag chair, depending on the material you choose to go with. So it is important to make sure you avoid getting any sweat on it. One of the best ways of achieving this is to make sure you keep clothing on as much as possible. If you are sunbathing, consider putting a towel over the bean bag.