Constructed of durable nylon, the Medicool Dia-Pak Classic organizes up to a 1-week supply of all your required diabetic supplies in a variety of pockets and storage compartments. A FREE cold gel-pack keeps your insulin cool for hours and is easily refrigerated. Water resistant and extremely durable, the Dia-Pak Classic will give you years of service. Holds everything-all in one place. Full 1 year warranty.