Made of 3-5 mm SBR neoprene, Specifications: 1.ITEM: Can cooler / bottle cooler / can holder 2.Material: Neoprene + Polyester fabric (double sides)3 ... keep you drink temperature for several hours Packaging & Delivery: Packing: 1 piece into a polybag, 500pcs into a master ctn wiht ... days for sample, 15 days after confirm samples Neoprene can cooler sleeve, cooler bag, beer cooler bag, cola can sleeve