The bracelet style (rubber) sporty OB the ship they sell (cheap) is good. We also have fitbit bracelets which work, but the PCL bracelets were better.
I also have the bangle style bracelet, metal, they sell (expensive) and wear it occasionally. They run small, so buy it on the ship.
I had the necklace or pendant style gold metal (expensive) but returned it. It is not practical, you have to take it off every time you go on/off the ship, or pop it out. It’s too short to scan for the readers OB. Okay for formal night. You can see the accessories they sell on the App…Medallion wearables, etc. Same ones OB.