These balls have a wonderful tactile appeal for children – a unique soft velvety-ish texture with some give to it! This 4” ball is made from the sap of the rubber tree, is biodegradable and non toxic. They are made from natural rubber foam, then covered with nylon flock which is sourced from the finest flock companies in Spain and Switzerland. Besides being durable and flexible the rubber foam is also anti microbial, dust mite resistant, mildew resistant, hypo allergic and flame retardant. Made in India.