The new S-ERGO ATX from Karman Healthcare has taken the innovation of Ultralightweight Wheelchairs to the next level! This unique frame is made with T6 Aircraft Grade Aluminum, and combines the support and stability needed for larger and stronger users, while still being lightweight enough for smaller and lighter users to comfortably use. The Globally Patented S-Shape Seat Frame provides pressure relief, comfort, and an anti-thrust function for a truly ergonomic design. In order to take your S-ERGO ATX with you anywhere, Karman has designed the frame with a unique cross-brace so your chair will easily collapse. In order to make this chair as smart and easy to use as possible, an auto-adjusting center of gravity shift axle moves as the seat height is adjusted.