There are many products that are transported from one place to another
Petrol, Diesel, etc. are transported through train and during monsoon such sheet is used to protect petrol or diesel from rain water.
The grains are transported from field to cities in between there are lots of danger for such grains due to bad weather, direct rays of the sun, rainwater, etc. So we can use this sheet to protect such precious grains that cultivated by farmers.
Truck or Lorry which is mainly used for long travel and most of the people travel in it. Obviously, people love comfort zone for such long drive so we can use this canvas in bed which gives softness. Also, this sheet is used as a cover of the truck which gives the warmness inside the truck and nothing matter about the outside weather.