Chenille Throw Pillows

I purchased many pillows chenille my bed I noticed that the stuffing inside begins to be spent and clumps after a certain time. Can anyone tell me if they can be washed in the washing machine? and if so, how can you maintain the shape after washing?

wash on gentle cycle and put in the dryer with 3 or 4 new tennis balls on medium heat, they will look brand new Agin is what I do. Be sure to wash in cold water.

What are they stuffed? poly if you can wash the sweet with a mild soap in cold water - if air dry for most moist until they are thrown into the dryer with a "clean" sneakers and cotton towel (which is not the pill) knocked around the sneaker to beat / lint ... is on the dry air ...