Compatible ModelsThe elastic braided nylon loop strap is compatible with Fitbit Sense 2 /Fitbit Versa 4/Fitbit Sense/ Fitbit Versa 3. Please note that your watch is compatible. Comfortable & Skin-friendly MaterialThe Fitbit Sense 2 elastic loop band is made of nylon, breathable, soft, comfortable, washable, non-pressure fit, no skin irritation or allergy, suitable for daily, sports and long time wear in any scenario. Fastening: Buckle Bohemian UK V4 elastic bands 01 Flexible Size AdjustmentThe Fitbit Versa 4 nylon loop straps have elasticity and can be flexibly adjusted according to the size of your wrist. Not too loose or too tight like other straps, they stay firmly on your wrist. Fit for 5.5''-9.8'' (140mm-250mm) large and small wrists for women men . Ready-to-change StyleFashionable colors let you match your dressing style, occasion and mood. This is also as the best gift for your lover, family, friends on birthdays, Thanksgiving, Mother's Day, parties, etc. Easy to InstallNo tools required, easy and quick installation.