You probably care a lot more about how a carpet looks and feels than how it's made. But taking a moment to learn a little something about carpet construction can help you make a wiser decision about your carpet purchase, including the fact that looks can be deceiving...
Carpet construction consists of the following components:
Fibers
Backing
Latex used to hold backings together
Density of pile
Pile height
Twist level of fiber
Shearing or finishing
Stain resistant treatments
Dye (color)