With the onSide air™ Convertible Car Seat from Safety 1st, you can keep your child rear-facing all the way up to 40 pounds! The car seat features our revolutionary air protect® technology for better protection around the head, where it's needed most.

• Air Protect® Revolutionary Side Impact Technology: Breakthrough system shields head and immediately reduces side impact forces through the precise release of air - LEARN MORE
• Rear-facing car seat from 5-40 pounds and 19-40 inches
• Forward-facing car seat from 22-40 pounds and 34-43 inches
• 4 harness heights and 3 buckle locations give growing child a better fit