【Compatible Models】Demark silicone straps are especially compatible with Fitbit Versa 2 & Fitbit Versa Lite & Fitbit Versa & Fitbit Versa Special Edition ONLY. Do not for any other devices or models. ( SMARTWATCH NOT INCLUDED ) 【Skin-friendly Material】The Fitbit Versa 2 Strap is made of premium soft silicone, durable and flexible, sweat and water resistant, and super lightweight that you might even don't feel it on your hand. Prevent skin from irritation. The silicone material is easy to clean, when it gets dirty, you could clean it with water and gently wipe it, it will get dry in a moment. 【Size Available】Available in Small and Large sizes. Small size fit for wrist 140mm-178mm ( 5.5" - 7.1" ). Large size fit for wrist 178mm - 220mm ( 7.1" - 8.7" ). A breathable air-hole can bring you a comfortable wearing experience. Since there might be a little difference between these bands' size and your original versa band, please do measure and confirm your wrist length before purchasing, choose the correct size according to our size reference so that to get a perfect fit. 【Multiple Colors】There are different popular colors for your choices, help to personalize your watch to be fashionable and attractive, and highlight your unique taste. In daily life, these versa 2 straps for women and men are suitable for both casual wearing and important parties, it's enough to wear all day and night, especially in sports, swimming, and workout. It's also a great gift for Birthday, Mother's Day, Father's Day, Thanksgiving Day, Valentine's Day,etc 【Seamless Match】:Fits are as good as an original band. Simple to install and remove, NO tools required! The end of the strap has a lug, which fit your Fitbit Versa / Versa 2 / Fitbit Versa Lite smartwatch in place and locked precisely & securely.