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 What is the battery life of ZeCircle2 ? How to clean my device? How to enable streaming music on my ZeCircle 2? How do I activate sleep mode on my ZeCircle2 ?