Doona X

A rear-facing infant car seat with a stroller frame built in, so there is no seat to unclip. It weighs 19.6 lb, collapses at the push of a button to 28.5 x 17.3 x 18 in and carries a child up to 30 lb or 32 in.

Weight: 19.6 lb; maker's figure
Folded size: 28.5 x 17.3 x 18 in; a 5.14 cu ft box
Max child weight: 30 lb; in the seat

Best for: Rideshare trips where a sleeping infant moves from car to pavement unbuckled

~$850list price at the last catalog update

What it does well

No transfer between car seat and stroller
LATCH base, infant insert and seat protector are in the price
19.6 lb includes the seat itself
Three recline positions for a sleeping infant

What it gives up

Rear-facing only, capped at 30 lb and 32 in, so it is outgrown in months
$850 for a seat that a toddler stroller will replace
Cannot be reclined in car seat mode

What you lift

19.6 lb as Doona weighs it.

Source: Doona spec: "Product weight: 19.6 lbs / 8.9 kg"

The first months: Newborns ride in an infant car seat. Doona: the product is a rear-facing infant car seat that converts to a stroller; infant up to 30 lb and 17-32 in, with a removable infant insert.

Why makers’ weights don’t always compare

Infant car seats

Doona lists no infant car seat for the Doona X.

Source: The Doona X is its own car seat, so no separate infant seat is paired with it

The whole car-seat matrix

Specifications

Approx. price: ~$850
Type: Compact & travel
Weight: 19.6 lb
Newborn option: Newborns ride in an infant car seat
Folded size: 28.5 x 17.3 x 18 in
Carry-on check: Over by 8.3 in (3 sides over)
Folded box: 5.14 cu ft
Fold: One-hand fold; Doona: "Folds and unfolds with the click of a button"
Max child weight: 30 lb; Doona: "Recommended infant weight: up to 30 lbs; infant height 17-32 in" (rear-facing only)
Recline: 3 positions
Car seats: None listed by the maker