VERSATILE DESIGN: You can squeezes or slide the marble back and forth, bend, fold it, pinch the sleeve together and roll the marble like shake bubble. EASY CARE: Made from premium quality BPA-FREE FIBER and MARBLE, well knit and durable, machine washable.FOR KIDS, PARENTS, OFFICE WORKERS to keep hands QUIET, for stress relief, improve focus etc. EXTRA STRONG: Made with high density fabric so marble won't pops out.SIZE: About 10cm long, comfortable to hold.