Using these Pro - Dive 5mm zippered diving boots is simple. Just unzip the ankle zip, slide your feet in, and zip it up. Make sure the boots fit snugly around your feet so your fins stay in place. When you're done diving, take them off and rinse them with fresh water to remove any salt or sand. Let them dry in a well - ventilated area, away from direct sunlight as this can damage the neoprene. Periodically check the zipper for any signs of wear and tear. If you notice any issues, it's best to get it repaired or replaced to keep using the boots safely and comfortably.