Despite the fact that there are sixteen generic fiber categories, manufactures designate their own fibers by different trade names. For example, polyester fiber is manufactured by different companies who call it by different trade names. By understanding the characteristics of the polyester fiber, you will be way more satisfied by your purchases.
Great designers use fabrics much as an artist does paint - skillfully creating a beautiful fashion. Often the home-sewer does not work this way. We put our garments together very similar to putting together a jigsaw puzzle. Sometimes we just don't get that fabric needs to be molded and draped to help us create the desired effect.
Here are a few ideas for you.
Our bodies are three-dimensional, and it's this three-dimensional puzzle that creates confusion in the fitting process. We are looking at humans who are round and patterns that are flat. It is almost impossible for us to look at a flat pattern and decide how it is going to fit our bodies.