Using these knee pad sleeves is easy. Just slip them onto your knees. You can wear them under or over your pants depending on your preference. When working, they'll stay in place thanks to the elastic cuff with silicone. For best results, make sure they fit snugly around your knees. As for maintenance, you can hand - wash them with mild soap and water. Let them air dry completely before using them again. Avoid using harsh chemicals or putting them in the dryer. Also, check the knee pads regularly for any signs of wear and tear. If the silicone on the cuff loses its grip or the EVA pad gets damaged, it might be time to replace them.