Key benefits Improves posture and reduces back discomfort during long periods of sitting thanks to ergonomic back support and a dynamic seating experience. Supports healthy movement and core strength by encouraging constant muscle engagement, improving blood circulation, stability, and balance. Suitable for use during pregnancy and labor. Durable construction and materials Base frame made from ABS and PE. Ball constructed from thick PVC with a honeycomb structure. Nontoxic, antiburst design with sturdy stability. Supports loads up to 160 kg. Easy installation and versatile use Simple setup: attach the seat back and wheels, then inflate the ball with the included pump. Ball and base are not connected, allowing for ballonly workouts when desired. Use scenarios Desk and workstation use: a traditional chair to promote active seating, improve posture, and reduce back strain during work from home or at the office. Pregnancy and labor support: suitable for use during pregnancy and labor to aid comfort and mobility. Home workouts: perform ballonly exercises to engage the core and enhance balance without needing to connect the ball to the base.