The Doona X Extra Infant Car Seat Base is a rear-facing LATCH base compatible with the Doona X Car Seat. Weighing 17.2 pounds and compliant with FMVSS 213B, it combines a height-adjustable support leg, integrated leveling system and color indicators to guide installation.
Why Parents Choose the Doona X Extra Base
An extra base makes it easier to plan everyday trips in another vehicle without moving your primary base each time. The click-in/click-out mechanism lets you attach and release your Doona X car seat, keeping the transition from home to car straightforward.
- The LATCH system provides secure anchorage with one-click installation.
- A height-adjustable support leg and integrated leveling system help guide setup.
- Color indicators help confirm correct installation, while the easy-release mechanism simplifies removal.
- The base complies with US FMVSS 213B regulations.
Doona X Base Specifications
- Compatibility is with the Doona X Car Seat.
- The base is intended for rear-facing use only and is designated Group 0+.
- Product weight is 17.2 pounds (7.8 kilograms).
- Dimensions are 14.7 inches wide by 25.75 inches long by 8.7 inches high (37.3 × 65.4 × 22.4 centimeters).
Frequently Asked Questions
-
Which car seat fits this base? This base is compatible with the Doona X Car Seat.
-
Can this base be used forward-facing? No. It is intended for rear-facing use only.
-
How does the car seat attach? A click-in/click-out mechanism allows you to attach and release the compatible car seat.
-
What helps guide installation? The base includes LATCH anchorage, a height-adjustable support leg, an integrated leveling system and color indicators.
Last verified: November 2026, against the supplied product specifications.
Posh Baby is a family-owned Portland boutique specializing in premium baby gear since 2006. Enjoy Tax-Free shopping in most states.
Build Your Baby Registry at Posh Baby
Create your universal baby registry with Posh Baby Portland — and add items from any store in the world. Our expert registry concierge team is here to guide you through every product category, from strollers and car seats to nursery furniture and essentials. Enjoy exclusive registry rewards, tax-free savings in most states, and the confidence of buying from a family-owned boutique that truly knows baby gear.
Universal Baby Registry
When you register with Posh Baby, you can add gifts from our store, Etsy, Amazon, Target, or that little boutique you love — shop small, shop anywhere. Add items regardless of whether your favorite stores even have a website. Our easy-to-manage registry has no limits on what you can add.
One registry. Every store. Endless possibilities.
Boutique Services Offered
Free Car Seat Install
Education Driven Experience
Try Before You Buy
Free Stroller Assembly
Shop tax-free in most states** **exceptions may apply
Loyalty Rewards
1 Point for Every $1 Spent
Earn loyalty points for purchases and other actions, then turn those points into real rewards. We believe in rewarding the families who choose to support us — we don't take your trust for granted.
Thank you for shopping small.
Registry Rewards
Purchase any 3 of the items below — whether you buy them yourself or your guests do — and receive a 5% rebate gift card based on the total of those 3 items. Use it in-store or online.
Mattress Nursing Chair Bassinet Car Seat Stroller Carrier Bouncer
Eligible items must be purchased from Posh Baby. Gift card is issued after qualifying purchases are confirmed.
