Abstract: A wrapper has an inner edge and an outer edge separated by a length. The wrapper has a first side edge and a second side edge separated by a width. The wrapper has an interior sheet and an exterior sheet. The interior sheet and the exterior sheet are fabricated from yarn with stretchable and elastic characteristics. Hook and loop fasteners couple the interior sheet adjacent to the outer edge to the exterior sheet. A plurality of pockets are formed between the interior sheet and the exterior sheet by rows of stitching between the first side edge and the second side edge. A quantity of temperature retentive material is within the pockets. Optional components include an electrical wire to facilitate heating and a container to facilitate heating and/or cooling.