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. 3.75" L x 0.5" W x 3.5" H. Price includes a 1 Colour Imprint. Imprint area is 1.625" W x 0.75" H on Front or Back. Call for multi-colour or multi-location imprints or for rush delivery availability.