Sometimes, the world of duck can be confusing. Who knew that one type of 100% cotton fabric could have so many variations, before you even add color? #8 Natural Cotton Duck is what's commonly known as a number duck. It does not mean that the duck weighs 8 ounces, but instead refers to a formula used to calculate the weight. #8 duck is actually just over 18 ounces per square yard. The lower the number, the heavier the duck. This particular variety is fantastic for applications such as upholsteries, or heavy duty, hardworking bags like golf bags or duffle bags for sports equipment. It can be dyed or left natural.