The chairs are filled with a quick dry polyfill material. They do dry faster than other padding used on furniture. If the chairs do get wet, we suggest tilting the chair forward or side to side to remove any standing water in the seat, gently pat underneath the sling seat and repeat the tilt of the chair forward or side to side and lastly make sure the chair is in the sun during the drying period. This is a steel set, and the inside of the frames are not powder coated like the outside so when water gets in the frame, rusty water can drain. We recommend covering the set while not in use to prevent rusting and wet seats.