Keeper fasteners rings are crafted from friendly materials to ensure comfort and prevent skin irritation during wear. Their anti-slip design allows for a secure fit within the strap buckle, making them ideal for active lifestyles.Made from soft and odorless silicone, these wristbands provide a comfortable wearing experience. They are designed to be gentle on the skin, ensuring that you can enjoy your activities without any discomfort.These wristbands are lightweight, flexible, and water-resistant, making them durable for everyday use. They are built to withstand various conditions while maintaining their quality and comfort.The band accommodates most adult wrist sizes, ranging from 4.6 inches to 7.1 inches. You can easily adjust the length to achieve the perfect fit without the need for any tools.Installing or removing the wristband from your Fitbit Ace 3/Ace 2/Luxe is a quick process that takes only 2 seconds. The classic buckle closure ensures a secure fit, while precise cutouts provide easy access to all features and buttons.