How to Transition Your Baby from Doona i to Doona+: A Smooth Upgrade Guide for Growing Families

As your baby grows, their needs change—and so does your gear. If you started with the Doona i Car Seat & ISOFIX Base, you already know the convenience of a car seat that seamlessly transforms into a stroller. But when your little one outgrows the infant seat, the next logical step is the Doona+ Car Seat & Stroller, designed for extended rear-facing use and higher weight limits. This guide will walk you through everything you need to know to make the transition smooth, safe, and stress-free.
Upgrading from Doona i to Doona+ isn’t just about buying a bigger seat—it’s about maintaining the same integrated travel system you love, while gaining additional features like enhanced side-impact protection and a more spacious canopy. Whether your baby has reached the height or weight limit of the Doona i, or you simply want to plan ahead, understanding the differences and the transition process will help you make an informed decision. Let’s dive into what you need to know.
When to Upgrade from Doona i to Doona+
The Doona i Car Seat & ISOFIX Base is designed for infants from birth up to approximately 13 kg (29 lbs) and 75 cm (29.5 inches). Once your baby reaches these limits, it’s time to transition to a seat that accommodates their growing body. The Doona+ Car Seat & Stroller supports children from birth up to 18 kg (40 lbs) and 83 cm (32.7 inches), allowing extended rear-facing use—a key safety recommendation from pediatricians. Most families make the switch between 12 and 18 months, depending on their child’s growth rate.
Signs it’s time to upgrade include your baby’s head reaching within 2.5 cm (1 inch) of the top of the Doona i shell, or their shoulders exceeding the lowest harness slot. Don’t wait until they’re uncomfortable—plan the transition a few weeks ahead. If you’re unsure, check the weight and height markers on the seat itself. The Doona+ offers a higher rear-facing weight limit, so you can keep your child safer for longer, reducing the risk of injury in a crash.
- Check your child’s weight and height against the Doona i limits regularly.
- Plan the upgrade before your baby outgrows the seat to avoid last-minute stress.
- Consider the Doona+ if you want extended rear-facing capability up to 18 kg.
Key Differences Between Doona i and Doona+
While both models share the iconic integrated car seat and stroller design, the Doona+ introduces several enhancements. The most notable is the extended weight capacity—from 13 kg to 18 kg—allowing rear-facing use for a longer period. The Doona+ also features a larger, multi-position canopy with a pop-out sun visor, providing better UV protection. Additionally, the side-impact protection has been upgraded with deeper head wings and energy-absorbing foam for improved safety in side collisions.
Another difference is the recline mechanism: the Doona+ offers a more adjustable recline for the stroller mode, making it more comfortable for older babies who want to sit up or nap. The harness system is also upgraded with no-rethread harness slots, simplifying height adjustments as your child grows. For parents who already own the Doona i ISOFIX base, note that the Doona+ is compatible with the same Doona X ISOFIX Base, so you may not need to purchase a new base—just the seat itself.

- Doona+ supports up to 18 kg (40 lbs) rear-facing vs. 13 kg (29 lbs) on Doona i.
- Doona+ has a larger canopy with pop-out sun visor for better sun protection.
- No-rethread harness makes height adjustments quick and easy on Doona+.
- The Doona+ is compatible with the Doona X ISOFIX Base, so you can reuse your base.
Step-by-Step Transition Plan
Start by reading the manual for the Doona+ Car Seat & Stroller thoroughly. Familiarize yourself with the new features, especially the recline adjustments and canopy operation. Next, install the Doona+ into your vehicle using the same ISOFIX base if you have one, or use the vehicle seat belt if you prefer. Ensure the seat is securely clicked in and that the base indicator shows green. Practice folding and unfolding the stroller mode a few times before your first outing.
When it’s time for your baby’s first ride in the Doona+, choose a short trip to help them adjust. The new seat may feel slightly different due to the deeper head wings and recline options. Bring along a familiar toy or blanket to comfort them. Check the harness fit: the straps should be at or below your child’s shoulders for rear-facing, and the chest clip should be at armpit level. After a few rides, most babies adapt quickly, and you’ll appreciate the extra legroom and sun protection the Doona+ provides.
- Read the Doona+ manual thoroughly before first use.
- Practice folding and unfolding the stroller mode in your home.
- Start with short trips to help your baby get used to the new seat.
- Adjust the harness to the correct height for rear-facing use.
Accessories to Enhance Your Doona+ Experience
Once you’ve upgraded, consider adding accessories that complement the Doona+ and make daily life easier. The Doona Essentials Bag is perfect for storing diapers, wipes, and snacks—it attaches easily to the stroller handlebar for quick access. For warmer months, the Doona Fabric Canopy and Shoulder Pads add extra comfort and style, while also providing additional padding for your growing toddler. These accessories are designed to work seamlessly with the Doona+ and maintain the sleek, compact design you love.
If you frequently travel or take public transit, the Doona All Day Bag is a great companion—it holds all your essentials and fits neatly under the stroller. For parents who want to keep their Doona+ looking fresh, the fabric canopy and shoulder pads are machine-washable, making cleanup a breeze. Investing in these add-ons can extend the functionality of your Doona+ and keep your family organized on the go.
- Doona Essentials Bag clips onto the stroller handlebar for easy access.
- Doona Fabric Canopy and Shoulder Pads add comfort and style.
- Doona All Day Bag is ideal for travel and under-stroller storage.
Transitioning from the Doona i to the Doona+ is a natural step as your baby grows, offering extended rear-facing safety and enhanced features without sacrificing the convenience of an integrated travel system. By planning ahead, familiarizing yourself with the new seat, and adding useful accessories, you can make the upgrade smooth for both you and your child. Ready to make the switch? Explore the Doona+ Car Seat & Stroller and discover how it grows with your family.