Using your Alta FLEX 360 Knee Protectors is easy. First, adjust the straps to fit your knees comfortably. Make sure the non - slip rubber strip on the back inside is in place to keep the pad steady. When you're working, the VIBRAM caps will give you great grip on different surfaces. After use, clean the knee pads with a mild soap and water. Avoid using harsh chemicals as they may damage the materials. Store them in a dry place. Remember, these knee pads are adjustable, so you can make them fit most sizes. And they're sold as a pair, so you always have two ready for work.