Large microwave flax heating pad, The "Flax Sak" Hot/cold pack with removable/washable cover. Large Flax seed heating pad with removable/washable cover. Great Christmas gift , available in 4 different herbal infusions, or simply unscented. Excellent for pain relief from fibromyalgia, nerve pain, arthritis, sports injury, milk duct obstruction , Neck, knee, back, tummy discomfort etc... Awesome for menstrual pain.