▲DIFFERENT COMBINATIONS: Trideer Exercise Ball Chair offers you different combinations to choose for workout. ▲ANTI-BURST AND DURABLE: Balance ball rated up to 2000 lbs, Made of eco-friendly, hypo-allergenic material, first-class processing. ▲PERFECT FOR HOME & OFFICE: Makes the perfect addition to your home exercise equipment to improve your core and overall strength. Furthermore, It can be used as an OFFICE BALL CHAIR to improve your posture & Relieve Back Pain.