Keeper fasteners rings are crafted from friendly materials to prevent skin irritation, ensuring comfort during use. The anti-slip design allows for a secure fit within the strap buckle, making them ideal for sports activities.Made from soft and odorless silicone, these wristbands provide a comfortable wearing experience. They are designed to be gentle on the skin, ensuring a pleasant fit without causing any harm.These wristbands are lightweight, flexible, and water-resistant, making them durable for everyday use. They are built to withstand various activities while maintaining their quality and comfort.The band accommodates most adult wrist sizes, ranging from 4.6 inches to 7.1 inches. It features an adjustable length for a perfect fit, allowing users to customize it to their preference easily.Installation and removal of the Fitbit Ace 3/Ace 2/Luxe wristband is quick and tool-free, taking only two seconds. The classic buckle closure ensures a secure connection, while precise cutouts provide easy access to all features and buttons.