Polyester is an artificial fabric that really came into fashion in the 70's. It is a fairly good fabric, as it has high resilliancy (the ability to bounce back from wrinkles) as well as high elasticity (the ability to stretch). It also cleans up fairly well, so long as you don't get oil paints in it. It drys in about 1/100th the time of cotton, so this fact combined with the fact that it doesn't wrinkle when you throw it on the floor makes it perfect for college students. the only real downfall of polyester is that it is hot in the summer and cold in the winter. Other than that, it is a wonderful fabric and i suggest that you all raid your uncle's closet and steal those canary yellow and powder blue polyester slacks for yourselves.