Hot & Cold Double Insulated Shipping Box 【Aluminum Foil Layer & Thermal Liner】The inner layer of cold shipping boxes for frozen food are aluminum foil, which can repels light and temperature long for long lasting insulation effects. With matched thermal liner is aluminum foil composite bubble, maximized to help extend the freshness of your items' shelf life and make delivery safer and easier. 【Durable & Reusable】The insulated frozen food shipping boxes are made of thickened kraft paper and the middle layer is made of high-density foam material, high compressive and well cushioned resistance that prevents damage during delivery. The insulated envelope bag liner is made of aluminum film, which is waterproof and oil proof, moisture-proof and easy to clean. 【Easy to Pack & Storage】The insulated cooler shipping carton and matched thermal insulation liner can be folded for storage and needs to be manually assembled. They take up less space than foam coolers and foam shipping containers, that you can be placed flat wherever you want, allow you to transport items while reducing costs. 【Widely Applications】The box for shipping frozen &hot food and aluminum foil insulated liner are applicable to food, beverages, vegetables, seafood, desserts, dairy products, meat products, frozen products, etc. For best usage, we recommend the use of combination of dry ice packs (Not Included) for refrigerated transportation, delivery and mailing. Hot & Cold Double Insulated Shipping Box with Aluminum Foil Insulated Bag Liner, Reusable Hot & Frozen Food Delivery Insulated Carton for Shipping, Mailing, Packing, Moving