1.If you are like most people, one pillow throughout the night is just not enough,or have sleeping problem.There's the pillow that goes behind your back for support, the one between your knees for temperature control and the two to prop up your head to aid in breathing. And, if you're pregnant...don't forget to add one more for tummy support. 2.The U shaped pillow is uniquely designed to follow the natural contour and shape of your body from head to toe. Perfect for sleeping and relaxing. Complete with removable/washable cover. 3.The U shaped head pillow allows you to attain the position and height that is just right for you. The extra long midsection is the perfect width for total back or tummy support... depending on the direction you choose to snuggle up in this pillow. 4.The slightly curved aside the belly as it conforms to your body's shape supporting your Pregnant belly and make you comfortable all night long!