Rated for over 1,000 hours of sun-fade resistance, this outdoor fabric is among the most durable fabrics offered. In a light rain, the water will bead up and run off. In a downpour or extended soaking, the water will eventually penetrate the covers and soak into the seat cushions and back pillows. The covers are machine washable (washing will not impact the durability or sun-resistance of the covers). We highly recommend that all cushions and back pillows be kept out of the elements when not in use.