Polyester, foam, feather and down pillows can be handwashed with a liquid detergent in cool water or machine washed, preferably two at a time on a short, delicate cycle in a tumble-type machine. They should be thoroughly rinsed. Pillows other than foam can usually be machine-dried on low heat, unless otherwise specified. If they're feather or down, put a couple of tennis balls in the machine to fluff them. Wet pillows can weigh quite a bit and even do damage to the dryer. Be sure to ring out the pillow really well before putting in to tumble dry. Throw in a clean tennis shoe to fluff the pillow and to keep the load balanced. Washing is tough on pillows. Wash a pillow once every couple of years if you use a zip-off pillow protector. Wash the pillow protector frequently. The temperature for the water should be at least 135 degrees to kill dust mites. Put pillows in the freezer to kill mites. Fat, fluffy pillows were once a sign of prosperity. http://www.hgtv.com/hgtv/dc_fabrics_bedroom/article/0,1793,HGTV_3388_1394896,00.html

You tore off that little tag didnt you... Some pillows wont return to their original condition after wash / dried. If it is really dirty, you might try getting a new one?

Feather and foam rubber pillows can successfully be machine washed, as long as you realize they are very heavy when wet. You need to wash two or three at a time (depending on the size of your washer and pillows,) wash them with something else heavy, or be prepared to rebalance your load frequently. If the pillows are extremely heavy and/or dripping alot of water when the load is "finished," chances are the washer became unbalanced and will need to be rebalanced and sent through the spin cycle again. Fiberfill pillows or occasionally pillows with foamrubber pieces can sometimes be successfully machine washed, but the seldom dry well in the dryer, even along with tennis shoes or, (my preference,) tennis shoes) without clumping badly and permanately. I dry these types of pillows with a shop vac, Rainbow vacuum, or any other vacuum cleaner that water, taken inside the collection area won't harm. Simply take the wet pillow(s,) one at a time, and place them in a trash (or preferably tall kitchen) bag. Insert the nozzle attachment (necessary) close to touching or (preferably) almost touching the pillow, inside the bag. Grip the nozzle firmly through the bag. After the air surrounding the pillow is sucked out of the plastic bag, the water will be removed. This usually gets the pillow 90-95 % dry and usually only takes about 20 minutes. The pillow will succussfully finish by air drying, inside or outside in about a day, depending on the relative humidity (where the pillow is being dried,) The higher the humidity, the longer the drying time. This method is much better than completely air drying the pillow because it always (at least for me for the last 31 years of my life) finishes drying the pillow before mold or mildew begins to grow.

If you have a good washer, you can wash it on the delicate cycle and low heat or no heat delicate cycle on the dryer for 20 minutes and air dry the rest of the way.