The TheraBand Stability Disc is a high-quality, durable training tool specially designed to offer intensity and instability to your current exercises, strength training and rehabilitation. This product is the most challenging of all TheraBand stability products. The design of this multi-purpose balance disc is made to be used as a progressive stability product, effective core exerciser and seat cushion for your home, work or travel. Each disc comes inflated and ready for your intended use and does not require an inflator. Unstable sensory-stimulating aid Silver, super soft, advanced level 2, non-latex PVC disc: pre-inflated and ready for exercise, training and active or dynamic sitting Lightweight and portable Provides automatic postural support for the body Be used to intensify exercises including crunches, lunges, push ups, planks and more Wipe-clean surface allows for easy sanitation