We have been providing PU stress ball for eight years. Our products are made of high quality polyurethane, which is both non-toxic and biodegradable. Polyurethane is also a resilient, very pleasurable material to feel that can be molded in an endless variety of different shapes, colors, firmness or softness. Stress relieveres as a promotional product have incredible versatility. They have the ability to be used as a complete and compact promotional program for virtually any company, large or small. These stress balls provide excellent solutions for marketing.