100% silicone rubber, harmless to body. 1)Material: 100% silicone, environment,ROHS approval.2)waterproof3)Normol Size(L*W*T):195*20*2MM.4)Logo Versions: Silkscreen printed, Debossed, Embossed, Color filled.5)New design,with nice looking printing6)OEM/ODM orders are welcome square silicone watch