Key features of the product include: Dual Therapy: It can be warmed in the microwave for relaxing warmth or cooled in the freezer for a therapeutic chill. Weight and Filling: The wrap weighs 3.5 lbs and is filled with natural clay beads that conform to the shape of your neck and shoulders. Material: It features an ultrasoft, luxurious polyester "mink" fabric cover. Benefits: It is intended for pain relief, muscle relaxation, and reducing tension or swelling.