Pillows are head supports used while sleeping. Ralli Quilt pillows are used in Pakistan and India and are quite popular. Pillows may be filled with synthetic fibers, fathers or down. The fill is covered with a cloth cover known as the pillow case. The pillow case may be made of various materials like cotton, satin, silk or even velvet. Silk and velvet are more commonly used in ornamental pillows since the fabric may be spoiled through constant friction.