This product is made of silicone. This badge has two layers. The inner layer is a plastic cover, which is used for holding certificate. The outer layer is a silicone, soft and flexible, which is used to protect the inner layer.Only one side is visible. It can hold 2 1/8 * 3 3/8 inch card. It is suitable for hospitals, companies, schools, activities, meetings, etc. Its lanyard size is 5/8 * 17 inches, and you can print your logo on the lanyard.