What is Canvas/Duck?
It is 100% cotton (sometimes cotton/synthetic blended or 100% synthetic) plain woven heavy-weight fabric. Above 10 oz/square yard (but now also include some fabric as light as 7 oz/sq.yard). The word “duck” is used to describe all kinds of canvas in North America, whereas in the rest of the world a lighter weight duck is known as “canvas” & heavy weights, used in industry, only as “duck”.