100%flannel Size:Our pillow cover fits 18 x 18 inch insert or smaller insert,All of our pillow covers are made to ensure a snug fit,TIPS: ONLY pillow covers contained, inserts NOT included. Great addition for home decor：This throw pillow cover will refresh your home, is easy to mix and match with other decorative pillows or decorations. Material: 100% flannel,suitable for children and pets.It is not easy to fade or wear, so you can use it with confidence. Easy to put on: Hidden zipper closure makes the appearance more elegant and easy to cram your pillow/filler into this cover. Wash and Care: Machine washable in cold water The pillow covers is made of top quality of flannel fabric