Medium Fine Pillow Best for Back Sleepers. A fluffy, supportive, soft pillow-in-a-pillow infused with three types of highest quality hypoallergenic down alternative fibers. We guarantee that this pillow is a super upgrade to the less desirable polyester pillows you find stacked in hundreds in stores. The 100% cotton casing makes the pillow cool, breathable and comfortable. Select standard, queen, or king. Back sleepers may place a Knee Pillow under their knees for ultimate comfort.