Flex Air Foam Sanding Pads, 5-PackRevolutionize Your Sanding with Flex Air Foam Sanding Pads! The Flex Air Foam sanding pads are specially designed to work the the Flex Air dustless sanding system. The Flex Air foam pad glides easily along the wall sanding down high spots similar to the way a sanding sponge would work. The Flex Air Foam Sanding Pad is perfect for sanding inside corners without scratching the adjacent wall. The foam backing is strong and flexible even tearing the foam