• Stimulates muscles and strengthens abs through natural micro-movements while sitting. • Designed in collaboration with an expert osteopath to improve posture and relieve back pain. • Handmade in Portugal with premium 100% polyester breathable, stain-resistant, and ultra-durable fabric. • Weighted base with anti-slip and anti-roll system for total stability. • Easy to carry thanks to its 360° belt and machine-washable cover at 30°. • Includes a pump for quick and easy inflation. • Regular size 55 cm ideal for people under 1.80 m tall.