Come and Check Our Branding Solutions.The stress ball is made of high pressure sponge interior and surface is the durable PU material. It is high elasticity, you can squeeze as hard as you can, it can resume in one second. This stress ball is designed to help you relief stress and anxiety at daily life, you can squeeze the ball when you feel nervous, stress or sad to relief yourself gently, it also help you practice your hand or fingers strengthener, or grip trainer too. You can stay it in your office, home and car. Pls check inventory and detailed info before placing your orders.