Kotatsu quilt and mattress set, 4-foot rectangle, 80 x 120, suitable for tabletops, glossy chenille weave and soft flannel lining, kotatsu quilt You will be enveloped in soft and fluffy texture. The lining and mattress pad that touch your skin are made of soft, smooth flannel material. The fluffy pile contains air, is highly moisturizing, and has an exquisite texture that makes you want to touch it forever. Wrapped in flannel, it's so comfortable you won't want to escape.