Comfortable Fit And Flexible Wearing Styles - Comes with a black magnetic band and a black silicone band. 33 permanent magnets are built into soft liquid silicone. The magnet fits firmly to the wrist, reducing the foreign body feeling caused by the buckle, and it's comfortable even when sleeping. The wrist circumference of the strap can be adjusted according to your wrist, which fits comfortably without worrying about the watch falling off.