The wagon liners are a cost-effective way to protect bulk materials and other loose or packaged goods. The lightweight shell not only prevents the cargo from coming into contact with the container's surface but also reliably protects it from spills, moisture, UV rays, snow, wind, and other adverse effects. The wagon liners are flexible boxes sewn to fit the dimensions of railway containers. The railcar liners are made of polypropylene. They are placed inside the truck or railcar before loading. After filling with bulk materials or other products, the packaging is sealed.