... bar inside,100%eco-friendly silicon case outside for protection. No harm to skin.FeaturesWater Resistant, Durable, Economic, Analog, Alarm, Chronograph ... grade of 100% silicone rubber, and HQ silicone rubber is no harm to skin.2.Round Alloy case(34mm) inside, Covered ... on the wrist, it can roll along your wrist naturally(no buckle needed),Steel bar inside, silicone outside for protection.7. Suitable ...