Abstract: A sleeping enclosure, which keeps a sleeping child covered throughout the night, is constructed from a bottom form-fitted sheet for a mattress with a top flat sheet stitched to the bottom form-fitted sheet along the foot end portion and partially along the longitudinal sides. A cooperating fastening element removably secures the upper unstitched portions of the top flat sheet to the bottom form-fitted sheet. An elastic strap connected to both sides of the bottom form-fitted sheet slides under the mattress to keep the bottom form-fitted sheet from pulling away from the mattress. The result is an enclosure inviting a child to snuggle.