Mist a pillow cover with water to dampen it in preparation for dyeing.
Mix the Tulip One-Step Tie-Dye in colors of your choice and pour into separate plastic bins.. Dip one side of the pillow into first color, being careful to not splash any dye. Squeeze out any excess dye back into plastic container before dipping other side.
Dip other side of pillow into second dye making sure both dyes don't touch. Squeeze out remaining dye back into bin.
Lay flat on a wire rackand cover in plastic wrap. Let set for 6-8 hours then rinse, wash, and dry.