Disney The Little Mermaid Ariel Imported, rare, hard to find Fleece box sheet, brushed, mattress cover Vintage sheet I installed it once, but it wasn't to my liking, so I took it off immediately, washed it, and stored it. It's in beautiful condition. It's a thick material, like a thin fleece, similar to a flannel shirt. Single size Height: Approximately 20cm The corners have elastic, so it will wrap the mattress securely.