Soft 100% cotton flannel 10-inch deep pockets and full-length elastic offers a more secure fit Fits standard 28 inch x 52 inch crib mattresses Machine washable Please adhere to JPMA's Safe Infant Bedding Practices. Trend Lab Deluxe Flannel Fitted Crib Sheets are cozy and stylish. Our Lumberjack Moose Flannel Crib Sheet features a directional print of mom and baby moose surrounded by mountains, trees, and clouds in traditional black, gray and white