What type of material is used on the ZeRound band? May 21, 2016 08:33 Updated The band of ZeRound is based on a thermoplastic polyurethane TPU Related articles Where can I purchase new wristband for my ZeTime? How do I navigate on my ZeTime? How do I change my wristband? Is it possible to change the ZeRound band? Where can I find ZeRound mobile App?