This inflatable balance cushion is way more versatile than it looks! Made from durable PVC material that's about 2.6mm thick, it's strong enough for serious workouts but gentle enough for recovery exercises. The seamless design means no awkward bumps or edges to bother you. It's got double-sided massage points that actually feel amazing on your feet while you work on your balance. Seriously great for yoga, pilates, physical therapy, or just strengthening your core and ankles. About 34cm across (that's roughly 13 inches), it's the perfect size for most exercises. The inflation process is a bit tricky though - you gotta be careful not to push the needle in too far or you might puncture it. But once it's inflated, it's seriously sturdy with great anti-burst protection. Whether you're a fitness enthusiast looking to challenge your balance, someone recovering from ankle issues, or just want to make desk sitting more active, this cushion delivers. Plus the purple color is actually pretty nice looking!