polyurethane foam;Fun kidney shape stress relievers- great for hospital staff giveaways!; Our handcrafted stress relievers are a fun way to promote your company, organization, hospital or school, while also helping everyone who receives one squeeze away the stress of everyday life!; Note: Due to their handcrafted nature, stress releiver sizes, colors and textures may vary, Factory cannot guarantee consistent imprints or PMS matches ; Not intended as a child’s or pet’s toy; Product Size: 3.5″ w x 2.25″ h x 1″ d;