What are the weight and height requirements for rear-facing installation of the Graco Slimfit 3 LX?

The Graco Slimfit 3 LX can be used in rear-facing mode for children weighing 5 to 40 lbs (2.2 to 18 kg) and up to 49 inches (125 cm) tall. Once your child exceeds these limits, you should transition to forward-facing or booster mode.