These bags are made from multiple layers of plastic, which is then sealed and heat-sealed together to form an airtight barrier. This protects the contents from dust, moisture, and other contaminants, making them ideal for a wide range of products, from food to electronics.The 3D design of these bags also offers excellent protection for the contents. The material is flexible enough to form around the shape of the contents, ensuring that they are firmly secured and safe from any potential damage. They also have a strong handle at the top, allowing them to be easily carried or hung.