Mesh Squish Ball - Rainbow Stress Ball Set of 5The squeeze ball toy is made of thick thermoplastic rubber (TPR) outer layer with small balls inside. These balls are very durable and can be squeezed repeatedly. No harmful chemicals are added. The ball has a sticky texture that provides a richer sensory experience and ensures that it stretches correctly as the title guarantees. The stretched pressure ball with DNA colored water beads and spikes can provide mental and physical stimulation in a safe,