Hot or Cold Therapy for Aches & Pains. Soothing Therapy for; Arthritis, Bursitis, Sore Muscles, Everyday Stress and more. Specially Designed for NECK, SHOULDER & BACK.For use as a heat pad, lay the Hot/Cold Therapeutic Comfort Wrap on a towel and place into your microwave for 1-1/2 minutes. Check the warmth of the wrap before using. If more warmth is desired, re-heat the wrap for an additional 15 seconds.For use as cold therapy, put the Hot/Cold Therapeutic Comfort Wrap into a plastic bag and place into your freezer for at least one hour.