See What 2in1 Travel System Tricks The Celebs Are Using
From Shiapedia
2in1 Travel System
A 2in1 travel system allows you to easily transfer your child from their car seat to their stroller, without having to wake them. These are often more expensive than pushchairs 2 in 1 but provide more comfort and flexibility.
Pick a model that best suits your lifestyle and needs for travel. Think about a combo car seat and stroller that can grow with your child, or one with an ample basket that can store everything from nappies to the day's groceries.
Convenience
A 2 in 1 pram and car seat-in-1 travel system is the best option for parents who want to take their child on regular trips without disturbing them. The travel system is comprised of the car seat and pushchair which attach to the same frame making it easy to transfer your baby from the car to the pram without disturbing them. There are many different combinations of this type of travel system, so you should select one that best suits your needs. You should also look for the pram that is comfortable and offers numerous features for your baby like a large basket and the capability to fold the stroller easily to store it. You can find models that let you install the car seat either forward or backward-facing. This is an excellent option for babies who aren't ready to walk.
Flexibility
A baby travel system can be an absolute lifesaver. It isn't easy to leave the house with a baby. Baby wipes, diapers and clothes take up more space than you think. When you add a car seat into the mix, it's more of a challenge. You'll need to keep track of the baby's nappy bag, keys phone and wallet, not to mention an infant sleeping in a crib that you would prefer not to disturb. A 2 in 1 pushchair and car seat-in-1 travel set lets you to attach a car seat and pushchair to the same frame, so you won't need to wake your child to take them to the car. The versatility of this kind of pram is what makes parents' lives easier.
Some travel systems can be used with both a carrycot (not included) and an integrated seat. It is important to think about this flexibility when choosing your pram and stroller 2 in 1.