Main Feature:PERFECT DESIGN:Fashion design, both lightweight and durable. And a row of pressing die compatible withming air holes, not only further reduce the weight, but also improve the permeability. and Silica gel materials, environmental compatible with protection and non-toxic, feel more comcompatible withtable, perfect compatible with sports wear.Contracted design style, with you life contracted and not simple. ADJUSTABLE SIZE:smart watch ,convenient and enjoy very much compatible with your exercise compatible with time With sweat grooves design, it's helpful compatible with sports.Compression molding, sturdy and durable It is with many air holes, which will make you feel ventilate Specification:Material: SiliconeStrap Length: about 230mm / 9.05inchLong belt: 102mm short belt: 95mmCompatible : compatible with Fit JR 3/ vivofit JR3 Watch Note:Please allow 1-3mm differs due to manual measurement.Due to the different display and different light, the picture may not show the actual color of the item. Thanks compatible with your understanding.Packing include:1 x Band Strap compatible with Fit JR 3/ vivofit JR3 (Tracker is not included.)