Turn off the Apple Watch if desired
Place the watch face down on a soft, clean surface
Locate the band release buttons on the back of the watch
Press and hold one band release button
Slide the band horizontally out of the slot
Repeat for the other side of the band
Align the new band with the slot
Slide the new band in until it clicks into place
Repeat for the other side
Gently tug each band to confirm it is secure