The inside wall is added with Al foil that has excellent thermal insulation effect, It can effectively extend the duration of protection for insulin.Application: Insulin, plasma and other biological products storage.It can keep your insulin cold for a long time. Easy for you to use insulin anytime, anywhere.No matter where you are, on the plane, on the train,in the car, it is very portable for you.This insulin pen travel case for diabetics is made of durable fabric and EVA material, ensuring great protection for your medicine supplies. Lining with aluminum foil could effectively extend the duration of protection for insulin.New and high qualityModel: y002Function: thermal / cold insulationColor: black. BlueSize: 20.5 * 9.5 * 7cmMaterial: Waterproof Oxford cloth + EVA + environmental protection aluminum foilLiner material: Waterproof Oxford cloth + 3mm pearl cotton + environmental protection aluminum foilPackage includes: 1 PCIce pack not includedNote:Please refer to the measurement. Tiny measuring error is allowable in normal range.There might be a little color difference due to the monitor, camera or other factors, please refer to the physical item.