Compatible Models: elastic nylon strap only Compatible with Fitbit Versa 4/ Fitbit Versa 3/ Fitbit Sense 2/ Fitbit Sense, please confirm your watch before purchase. Premium Nylon Material: Fitbit Versa 4 sport Compatible strap is made of high-quality nylon material, which is skin-friendly, comfortable, breathable and durable, which can bring you a comfortable wearing experience. The Breathable straps are very suitable for wearing for a long time, especially for hot summer sports, it is the best choice for your sports. Classic Adjustable Size Design: Fitbit Sense 2 strap with adjustable buckle design, you can easily set the size you want. The adjustable strap suitable wrist size is 6.1in-9.7inch (155mm-245mm), you can buy according to your wrist size. Suitable for people of all occasions and all ages: Fitbit Versa 3 nylon strap allows you to easily install and adjust the size without any tools. The comfortable strap has 12 colors for you to choose from, which can meet your various matching needs. It is the best gift for family and friends. Intimate after-sales service: If you have any questions about our Fitbit Versa 4/Fitbit Versa 3/Fitbit Sense 2/Fitbit Sense Strap, please contact us at any time, we will serve you wholeheartedly.