MILTI-fUNCTION: Relieve back, correct posture, relax muscles, help stretch. Enlarged The diameter of the chair steel(25mm), dilated Lumbar support, wear-resistant, skin-friendly, breathable and dirt-resistant cushion, Non-slip hoof chair foot. Make the chairs safer and more comfortable to use. Take off the lumbar Support will also works as a normal chair but more solid. Small and can be folded to save space Maximum bearing weight: 350lbs