Abstract: A flat plate-like anchor with adjustably attached flexible strap is positioned between the box springs and mattress toward the head of the bed. The adjustable attachment of the strap to the anchor allows varying the effective length of the strap for use on different thicknesses of mattresses. The strap is drawn up across the edge of the mattress to have a distal end thereof on the top of the fitted sheet covering the mattress. The end of the strap has an affixed portion of hook and loop fastener. An openable pinch clamp is positioned on the top of the lower or fitted sheet adjacent the strap, and the upper edge of the top sheet and blanket are tightly clamped in the releasable clamp. The clamp includes a pivotally attached extending tab having a mating portion of hook and loop fastener for attaching to the fastener of the strap.