Features: Multiple-layer designs, easy to place different kinds of medicines. Insulin bag cold storage time: keep the temperature in the pack 2-24 degrees Celsius, about 12 hours in summer, about 24 hours in spring and autumn. Zipper designs, easy to open and close the bag, can better protect internal medicines. Made of oxford cloth, waterproof and eco-friendly and durable. Light weight and portable, easy to carry when going out. Specification: Material: Nylon Opening method: Zipper Lining: Polyester Size: 18cmx12cmx6cm Color: as pics shown Package include : 1 x Insulin Cold Storage Bag