Using these chairs is a breeze. You can place them indoors or outdoors as you like. Since they don't require assembly, you can start using them right away. When it comes to stacking, you can stack up to 5 chairs high, but be careful not to stack more to avoid them toppling over. The fixed floor glides are there to protect your indoor floors, so make sure they're in place when using the chairs inside. As for maintenance, it's very easy. Just wipe the chairs clean with a damp cloth regularly to keep them looking good. Also, don't overload the chairs as their static weight capacity is up to 400 lbs. Keep them in a dry place when not in use to prevent any damage to the Textilene and aluminum frames.