HCBACK: Herbal Concepts largest Comfort Pac. The Herbal Comfort Back Wrap provides 100% All Natural Aromatherapy. The Comfort Back Wrap is filled with 12 healing herbs and the highest quality natural grains available. The detailed stitching keeps the herbs evenly distributed allowing the natural herbal content to contour the curves of your body and help relieve stress tension cramps and muscle discomfort. Microwave for instant heat therapy or chill for instant cold therapy.