Best Buys 6 best lie-flat car seats from birth Expert guide to innovative Group 0/0+ car seats that enable babies to sleep safely when out and about 1 of Ad break Why lie-flat?Research shows that it's essential for healthy development that newborns lie flat for the majority of the time when they're sleeping or lying down. What does that mean for car seats? In normal car seats, babies sit in a fairly upright position. Therefore, it's recommended that babies stay in them for no longer than two hours at a time as their breathing may be compromised. This 2 hour rule includes travel systems too. While a more upright position is safer when travelling in the car in the event of an impact, a lie-flat car seats will stop your little one from being in the scrunched position and enable them to breath easier. Some of these seats can be flat while in the car and when on the frame of a buggy, while some can only be in the flat position when attached to a pushchair. We've listed two types in our round up; Group 0 lie-flat car seats Group 0+ lie-flat car seats Click through to see our pick of the best... Kiddy Evoluna i-Size , £389.95Age: Birth - 15 months (Group 0+) Type of lie flat: Lies flat in car, on buggy frame Travel system compatible: Yes German manufacturer Kiddy introduced the first lie-flat infant car seat in the UK back in 2013 with the Evolution Pro. Transforming from the carrying position to a lie-flat mode in one swift move made the Evolution Pro one of the most innovative seats in the market. The latest lie-flat innovation from Kiddy is the Evoluna i-Size. It features all the safe benefits the Kiddy car seat is known for, (five-point safety harness, rocker function, travel system compatibility) but takes safety to the next level as it meets the new i-Size car seat law. Read our full Evoluna i-Size car seat review here You can buy the Evo-Lunafix from Natural Baby Shower, Johnston Prams or Very Compare deals from top retailers MadeForMums Preferred Partner Jane Matrix Light 2, £205Age: Birth - 12 month (Group 0+) Type of lie-flat: Lies flat in car, on buggy frame Travel system compatible: Yes As the name would suggest, the Matrix Light is a lightweight lie-flat car seat and carrycot. Suitable from birth to 12 months the Group 0+ chair is travel system compatible with most Jane buggies and has a built in shock absorber. It can also be used with the Matrix Light 2 platform, which works like a secure base to fix the seat into the car, and also has a swivel base. Read the full Matrix Light 2 review here Buy the Jane Matrix Light 2 from Precious Little One Compare deals from top retailers MadeForMums Preferred Partner Cybex Cloud Q, £220Age: Birth - 15 months (Group 0+) Type of lie flat: lies flat only on buggy frame Travel system compatible: Yes Cybex launched its first lie-flat car seat, the Cloud Q at the 2014 Kind & Jugend baby and toddler trade fair, where it received positive reactions. Due to hit the shops the middle of 2015, the Group 0+ seat can be used up until the age of 18 months. It has an 11-position height adjustable headrest and Cybex’s Linear Side Impact Protection system as featured on its Sirona car seat. It's ISOFIX compatible with the Q-Fix base. However, it's worth noting that the Cloud Q cannot lie flat while in the car, only when attached to a pushchair frame. The Cloud Q is travel system compatible with the brand-new Cybex Priam buggy. Buy the Cybex Cloud from John Lewis Compare deals from top retailers MadeForMums Preferred Partner Continue slideshow > Britax Baby Safe Sleeper, £140 Age: Birth - 12 month (Group 0) Type of lie-flat: Lies flat in car, on buggy frame Travel system compatible: Yes The Britax Baby Safe Sleeper is lie-flat only car seat and can be used up to 6 months, so you'll need to buy a Group 0+ seat at 6 months. Featuring a 3-point safety harness and adjustable backrest, it has an energy-absorbing interior to protect your little one in a 360-degree cocoon. It can be used as a very comfy carrycot. It's also very easy to attach to any Britax Click & Go pushchair chassis - with its single-handed release mechanism. Buy the Britax Baby Safe from Boots Compare deals from top retailers MadeForMums Preferred Partner Jane Transporter 2, £270Age: Birth - 12 month (Group 0) Type of lie-flat: Lies flat in car, on buggy frame Travel system compatible: Yes A leader in the lie-flat car seat industry, Jane has enjoyed growing success with this award-winning lie-flat only car seat, so much so that it is in its second generation. The Transporter is a combination of car seat and carrycot and is travel system compatible with all Jane buggies, including the Trider Extreme, Slalom Pro and Mumm pushchairs. However, like the Britax Baby Safe Sleeper it is a Group 0 and only holds your baby up to 10kg (around 6 months). It's therefore an expensive choice unless you plan to frequently use the carrycot or travel system set-up. Buy the Jane Transporter 2 from Precious Little One Compare deals from top retailers MadeForMums Preferred Partner Britax Baby Safe i-Size, £265Age: Birth - 15 months (Group 0+) Type of lie flat: lies flat only on buggy frame Travel system compatible: Yes Offering a near lie-flat position with the Britax Flex base, the Baby Safe i-Size is the latest version of the popular Britax infant car seat. It is travel system compatible, features side impact protection and 5-point safety harness. When tested out, our MFM mum said the seat "offered more room to grow than our Stokke Izi Go and nudged ahead of our Maxi Cosi Pebble on account of its secure, five point harness, together with the fact it is suitable for babies up to 83cm." You can see the full review on the Britax seat here. This car seat is available to buy from Britax, Precious Little One or Pram World Compare deals from top retailers MadeForMums Preferred Partner Lie-flat car seat safety explained Group 0 lie-flat car seats - Your baby lies completely flat in the car as he would in a cot. There's a safety restraint holding him in, and a safety mechanism to keep the seat fixed in the car. These car seats can also be used at home as carrycots Sounds great, but the main drawback is that these car seats will only last until your baby is 6 months (they're called Group 0). This means you then have to buy an expensive rear facing Group 0+ seat for a few months, until your child is able to move to a Group 1 seat. Best for: Parents who are going to be travelling on a lot of long car journeys with their baby and want to use the car seat as a carrycot too. Group 0+ lie-flat car seats - These car seats act like traditional seats in the car, but then have a mechanism to change to a lie-flat position. You can make them lie-flat either when you take your baby out of the car and into your home, or when you want to attach your car seat to your buggy. These Group 0+ car seats can last from birth up to at least 12 months, some even last until 18 months. Best for: Parents who frequently use their travel system, enabling them to keep their baby safely in the car seat for longer periods than 2 hours. Worried about Installing a car seat? We tell you what to do here. Want more car seats? We've got you covered... 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