Colorfast is a term to describe the locking the color into the fibers. This process prevents a color from run, fading and/or bleeding. There is few things that can be worst than when a red shirt bleeds, ruining your entire wash. When buying clothing, if the color of your clothing or sports team seems to fade too quickly, then you may want to experiment with colorfast garments. Beyond the cleaning process, a colorfast garment keeps the same color, even when the person wearing that garment in the bright outdoors or when perspiring. Just like paint on a house or vehicle, nothing lasts forever. Colors will fade at a must lower rate when so treated.