The Kozy Wrist Wrap is the best, most versatile, wrap for microwavable heat or cold. The Kozy Wrist Wrap can be used on the left or right wrist .Will help relieve swelling, carpal tunnel, wrists pains and strains. Held in place with adjustable Velcro strap. Can also be used on ankles. Aromatherapy smells like sleepy time tea. Also available with out the aroma therapy. * Heats in only 15 seconds to 30 seconds in the microwave. * Test the temperature before placing on the eyes or skin. * To freeze, store in a ziplock bag in the freezer.