These Stress Balls Are Made of PU Foam, Which has No Irritating Odor & is Less Likely to Wear Out or Fade, Even After Prolonged Use. in Addition, These Balls Are Stretchy & Have a Strong Rebound, Which Gives You a Comfortable Touch & Grip & Provides You with a Good Feeling in Your Hand. They Are Very Suitable for Adults, Childrens & the Elderly as a Great Toys to Release Stress, Release Anxiety, Boost Morale, Motivate Yourself, Improve Focus or Make a Fun. Its Also a Great Tool for Doing Rehab for Those Who Dont Have Dexterity in Their Hands. They Are Equally Suitable for Offices, Schools, Rehabilitation Centers, or at Events Like Corporate Meets, Conferences, Etc., Where People Might Need an Instant Stress Buster. Logo Customization is Available.