Made of 100% microfiber. Hypoallergenic, top-quality microfiber fabric, making this pillowcase incredibly soft, luxurious, and breathable. Envelope closure, no uncomfortable zipper, easy to put on and off the pillows. You can leave it open or can tuck excess back into a pillow for a beautiful clean look. These super soft body pillowcases take the place of multiple pillow covers to support your hips, back, neck, and stomach, making them an excellent choice for expectant mothers, dorm rooms, kids' bedrooms, and more.