One side is covered with ultra-soft, plush material , Loop strap at each end provides a convenient method for holding in place, Innovative â€œPearl Beadâ€ technology delivers warm and cold therapy without any mess. Simply microwave for warm therapy or freeze for cold therapy . Double Safety Tested: CPSIA, FDA, and TRA (Toxicological Risk Assessment). Reports for Pearl Beads are available upon request . Instructions printed on item. Complies with CPSIA, FDA, Prop 65. 0.75" H x 4.5" Diameter. Price includes a 1 Colour Imprint. Imprint area is 2.5" W x 0.0" H on Front. Call for multi-colour or multi-location imprints or for rush delivery availability.