Child weighs 5–11 lb (2.3–5 kg). You MUST use the infant insert if the harness straps are positioned above the child's shoulders and the child weighs between 5–11 lb.
Install the infant insert to improve harness fit and recline angle for smaller infants. Pull the harness buckle through the slot in the bottom of the insert, route the harness straps through the side gaps, push the insert firmly into the seat, and keep the crotch belt locked in the inner position.
Whenever the harness is no longer at the correct shoulder level: rear-facing at or just below the shoulders, or forward-facing at or just above the shoulders.
With the harness loose, squeeze the head support button and move the head support to a locked position so the harness is at the correct shoulder height. Keep the bottom of the head support close to, but not compressing, the child's shoulders.
When the current crotch belt position is no longer the one closest to, but not under, the child.
Loosen and unbuckle the harness, move the crotch belt plate forward or backward to the desired position, and rethread the buckle through the correct seat-cover slot. If the infant insert is in use, remove and reinstall it per the manual.
The head insert may be used or removed for improved comfort or fit of any child at any time.
Remove the head insert only if needed for comfort or fit. Nuna does not give a weight-, height-, or age-based removal point for this component.
The harness pads may be used or removed for any child; small infants may have better fit to the harness with the shoulder pads removed.
Remove the harness pads if needed for better fit. Nuna does not give a weight-, height-, or age-based removal point for this component.
The infant insert is only for use with infants who weigh between 5–11 lb (2.3–5 kg).
Stop using the infant insert once the child is above 11 lb (5 kg). After removal, re-check harness height and crotch belt position for correct fit.
If installed rear-facing with the lower anchor belt and the child weighs over 35 lb (15.9 kg).
Do not continue rear-facing lower-anchor installation above 35 lb. Reinstall the restraint using an allowed vehicle-belt method.
When rear-facing is outgrown and the child is at least 2 years old, 30–65 lb (13.6–30 kg), and 34–49 in. (87–125 cm) or less.
Reinstall the RAVA forward-facing using a permitted forward-facing installation method. Select a forward-facing recline position 1–5 (RED), and always use the tether if the vehicle is equipped with a tether anchor point and vehicle requirements are met. Nuna also cites the American Academy of Pediatrics recommendation to keep children rear-facing as long as possible up to 2 years of age, or until they reach the seat's maximum rear-facing height and weight.
If installed forward-facing with the lower anchor belt and the child weighs over 40 lb (18 kg).
Do not continue forward-facing lower-anchor installation above 40 lb. Reinstall the restraint using an allowed vehicle-belt method and use the tether as directed.
Child exceeds 65 lb (30 kg) or exceeds 49 in. (125 cm) overall.
Discontinue use of the RAVA once the child is over the seat's overall size limits. The reviewed official sources do not provide booster-mode use for RAVA.