Come and see our amazing products. Made of thick thermoplastic rubber (TPR) outer layer with small beadies inside, these are highly durable and will last numerous squish. There are no harmful chemicals added. Balls have a sticky texture for a richer sensory experience to ensure that they stretch properly as guaranteed in the title. If dirt sticks to the balls, they can be rinsed with warm soapy water and will be as clean as new.The small size and lightweight makes it easy to carry to the classroom, office, living room, bedroom, church, or even school buses, airplanes and driving trips, these balls are very quiet, you can relieve stress, anxiety, and tension anytime, anywhere. And It's sharable between siblings, friends, and officemates. Pls confirm with us about the packing info, stock color and exact production time before placing your order.