The 2-piece design consists of a separate, easy-to-wash pillowcase and an adjustable air bladder which you can set to the exact firmness and height you're after. The Zenbivy Pillow offers an ultra-soft 50d Pongee pillowcase with quilted plush padding on the top that is downright luxurious. The Zenbivy Light Pillow is made from the same soft Pongee fabric but saves half the weight by eliminating the quilted synthetic padding.