What is the material used for manufacturing ZeCircle2 strap ? November 11, 2016 16:48 Updated The ZeCircle2 strap is made from silicones and thermoplastic polyurethanes. Related articles Follow Can I wear ZeCircle2 while swimming / showering How do I change my wristband? How to activate the Find my phone function on my ZeCircle2 ? What is the Bluetooth operating range of ZeCircle2 ?