Durable, lightweight TIG-welded frame folds down for easy transport. Swing-back, desk-length arms flip back for easy ins and outs. Breathable nylon upholstery and custom adjustability (dual-axle hemi-height and back height) provides a more comfortable user experience. Smooth-rolling latex tires are solid and flat-free for lasting durability. Quick-release axles provide easy, tool-free removal of rear wheels.