The Hybrid Youth Sport gives you all the safety of an adult version, but 25% smaller to fit a junior driver as young as 4 years old. Lighter, sleek, modern and appealing with defined wings for seatbelt containment. The sliding tethers and patent pending multi-tether system enhances side to side range of movement and field of vision. With it's lightweight design and DuPont® and carbon/polymer construction provides maximum comfort and maneuverability with superior strength.All of Simpson's Hybrid Series head restraints are designed for easily exiting a car without the danger of being entangled in other gear by offering the lowest profile of any comparable device.