Description: Thick Construction: The 3mm thick design enhances durability and insulation efficiency, ensuring that your food remain protected from external temperaturesPremium Material: Self- Seal Thermal Box Liners are made from aluminum foil and pearl cotton material, which has great thermal insulation performance. It can effectively maintain the temperature of food, whether hot or cold, ideal for both delivery services and personal usePackage includes: 4 pieces aluminum foil insulated bags, foil insulated box liners are suitable for lunch boxes, shopping bags, shipping boxes, delivery bags. Great for shipping mailing packing hot and cold foodVersatile use: Multi purpose shopping bag lining insulation bags are great for keeping a variety of items fresh and temperature controlled, including fruits, fresh produce, cakes, and crabs, seafood and moreWide Application: Self- Seal insulation package insulated box liners envelopes are leakproof and waterproof, ideal for restaurants offering takeout services or individuals who regularly shop in bulk. also suitable for camping, picnic Specification: Material: Foil, Pearl Cotton Size Chart: 34cmx23cmx31cm/13.39inchx9.06inchx12.20inch Package Includes: 4 Pieces Self- Seal FoilInsulation Bags Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.