Polyester SOFT AND BREATHABLE: Our pillow cover is made of premium polyester fabric that is ultra-soft, breathable, and gentle on your baby's delicate skin. Perfect for "Boppy" nursing pillow. Pillow NOT Included. HIDDEN ZIPPER DESIGN: Our invisible zipper is tucked away to ensure it won't harm your baby's sensitive skin. EASY TO CLEAN: Our pillow cover is easy to put on and take off, making it effortless to machine wash and won't fade after hundreds of washing, which is good difference from cotton material. UNIQUE DESIGN: Our pillow cover features a beautifully designed checkerboard pattern, adding a touch of modern elegance to any home decor. Whether placed on the bed or sofa, it enhances the overall aesthetic appeal. PERFECT BABY SHOWER GIFT: Our premium nursing pillow cover is an absolute necessity for your baby registry and makes the perfect baby shower gift for new parents.