210 PVC Waterproof Bag This bag is made of 210 PVC material. “210” here usually refers to the specification of the fabric (such as the thickness of yarn or the density of the fabric, with specific definitions varying slightly in different scenarios). PVC (Polyvinyl Chloride) is a polymer material with excellent waterproof performance. It can effectively prevent water from seeping in, making it suitable for various occasions that require waterproofing, such as outdoor activities, travel, and daily storage of items that need to be protected from moisture. Whether you're going on a hike, having a picnic, or just need to keep your belongings dry in rainy weather, this waterproof bag can provide reliable protection.