So What Exactly Is a PP Woven Bag? At first glance, it looks like a regular plastic sack. But it’s anything but basic. These are made from polypropylene, a type of plastic polymer known for its strength, flexibility, and resistance to wear and tear. The “woven” part? That’s the magic. The plastic strips are woven together in a crisscross pattern, kind of like fabric, making the bag super durable and able to hold significant weight without breaking a sweat (not that bags sweat, but you get it). Some have extra features like UV protection or moisture resistance. Others are laminated for extra strength. A lot of them are even printable, so businesses can slap their logos right on them.