Buckle closure specifically designed for fitbit charge 5,it matches perfectly Soft Comfortable Material: Soft nylon material, this material isn’t itchy. personalize stylish pattern, Durable and comfortable, simplicity and ease, easy to slide on, fits snug and comfortably. you can’t even feel you're wearing the watch. Adjust as You Wish - stylish stainless steel loop buckles design allows you to adjust the size of the loop as you wish. Suitable for wrist size 4.5"-9.5" ,With the strong super stretchy elastic,easy to put it on or take it off.