Using your Rogz Sparkle Cat Collar is easy. First, adjust the collar to fit your cat's neck comfortably within the 25.5 - 31cm (10 - 12') girth range. Make sure it's not too tight or too loose. When putting it on, use the pin buckle to secure it. For night - time safety, the reflective materials on the collar will help you and others spot your cat easily. As for maintenance, gently hand - wash the collar in mild soap and water, then let it air dry. Keep an eye on the safety elastic and the pin buckle. If you notice any signs of wear and tear, it's time to replace the collar. Also, always supervise your cat when it's wearing the collar to ensure its safety.