Simply microwave for warm therapy or freeze for cold therapy, Double Safety Tested: CPSIA, FDA, and TRA (Toxicological Risk Assessment) . Safety reports for Pearl beads are available upon request. Reusable and easily cleaned with mild soap and water. Complete care and instructions printed on item . Complies with CPSIA, FDA, Prop 65. 4.5" L x 4.75" W x 0.5" H. Price includes a 1 Colour Imprint. Imprint area is 1.5" W x 0.625" H on Front. Call for multi-colour or multi-location imprints or for rush delivery availability.