These insulin cooler bags are made of high-quality aluminum foil and nylon Oxford fabric, providing waterproof, abrasion-resistant, and heat-insulating properties. The inner lining is lined with high-quality aluminum foil for excellent insulation. After 3 hours in the freezer, the optimal temperature can be maintained for 6-8 hours. Perfect for stress-free outdoor activities with plenty of cooling.Portable: Our insulin pen travel case is compact, measuring only 20 x 7 x 5 cm, making it easy to carry. This compact and insulated cooler bag can be easily carried with one hand and fits easily into a handbag or backpack. Perfect for daily commutes, outdoor activities, and short trips.Durable and Safe Materials: Our diabetes travel case is made of high-quality Oxford fabric and three-layer EVA material (aluminum lining) to ensure the integrity of hot and cold items.Organized Storage Solutions: Our insulin cartridges are efficiently designed to neatly store 2-3 insulin pens, refill solutions, syringes, needles, or alcohol wipes. Our insulated medicine travel case allows you to keep all your items organized when you're on the go.Complete Package: Includes 2 diabetes insulin travel cases (*insulin pen not included).