the Product Uses 3mm Eco Friendly Diving Material, Which is a Synthetic Rubber Foam with Delicate, Soft, & Elastic Feel. It has the Characteristics of Safety, Environmental Protection, Lightweight & Wear-resistant, Waterproof & Seismic Resistance, & Super Buffering Performance. It is Tightly Attached to Cans & Thermal Insulated Cup, with Excellent Elasticity & Delicate & Soft Feel the Fabric is Not Easy to Snag, & the Material is Sturdy & Durable Washable, Non Fading, Non Staining Designed to Snugly Hold Most 12-16 Oz. Cans, Longnecks, & Water Bottles, These Coolers Offer Versatile Insulation for Your Favorite Drink. Their Customizable Nature Allows You to Add a Personal Touch to Your Refreshment Accessories. Measuring at 5 Inch L x 4 Inch W When Flat,