The dynamic Scout is designed with built-in lumbar support and a 20 degree fixed tilt at shoulder level to encourage stability and good posture. Thanks to the disc brakes, the same type used on high-end mountain bikes, and the knobby wheels, you'll enjoy superior performance on a variety of surfaces. An array of positioning options help you achieve the ideal position for your child, and most options need not be removed when folding the chair. Its patented design provides maximum comfort and durability.