Railroad (flame retardant free fabric) Features : -Rigid-UAS; Olli’s rigid-UAS system makes proper installation effortless and provides greater stability to the booster seat in the event of a collision and hols it in place even when he is not busy. -Better positions the seat belt on the child’s hips to improve safety -Confirms that latches are locked with an audible “click” -Quick release system for easy removal -Olli booster seat raises your child 10 cm/4 in. to improve in-vehicle shoulder belt fit -No numb-bums; it’s built like the seat in your car. The Comfort-cube construction includes an additional layer of padding that protects against numb-bum! -Fabrics are GREENGUARD Select Certified and provide permanent protection against stains, moisture and odor-causing bacteria. -Detachable and dishwasher-safe cup holder -Light Weight; weighs 5,5lb / 2.5 kg for easy portability between vehicles, through the airport or walking through the city. -Fabric on the underside protects your vehicle seats from scratches or snags. -Meets all Federal Motor Vehicle Safety Standards and Canadian Motor Vehicle Safety Standards Recommended child size: 40" to 57" / 101cm to 145cm Recommended child weight: 40lb to 120lb / 18kg to 54kg Expiration 9 years *Limited Lifetime Warranty by Clek