It’s difficult to assess how a pillow will support you month after month, year after year! It’s also difficult for you to decide how high or hard your pillow should be. By enabling you to change the loft or filling of the pillow you can adjust these properties to meet your personal needs. In fact, over the years you may wish you had a softer or thinner pillow rather than the one you chose initially. Rather than purchase a new pillow, you can add or remove filling to bulk the pillow up or reduce its thickness to something more comfortable for you.