ZENY™ Ergonimic Kneeling Chair Ergonomically Designed Knee Stool with Casters Adjustable HeightAbout the product: Ergonimic Kneeling StoolErgonimic design eases the hip forwards and encourages an upright posture by aligning the back, shoulders and neck to relieve strain on the lumbar muscles. Correct sitting posture,prevent spinal curvature. Sturdy Metal ConstructionZENY knee chair made with sturdy metal frame. X type structure, heavy duty and more stable. Wear resisting,prolong service life. Thickened CusionZENY Ergonimic kneeling chair has