Morphable Bed Covers (Comforter, Sheets, etc.)?

EightiesIsEnough

Are there any morphable bed covers, such as comforters, quilts, sheets, etc., that I could purchase or, even better, acquire for free?

When I say morphable, that means the cover can be pulled, in the event that the person gets up from bed or gets into bed.

Richard Haseltine

Not morphable, as such, but there's https://www.daz3d.com/ultimate-dforce-bed