Baby Grows & Baby Sleepsuits

Yes. In the UK, "sleepsuit", "babygrow", "baby grow" and "all-in-one" all describe the same thing: a one-piece, long-sleeved suit with legs. Different families use different words for it. If you've shopped with us before, ours were previously called Rompers.

Five to seven is a sensible starting point. Newborns get through two or three a day once you count the changes nobody warns you about, so you want enough to cover a wash cycle plus a spare in the changing bag. Most parents build up from there rather than buying big upfront.

It depends on the room. In a warm room a babygrow on its own is usually plenty. As it cools, a vest or bodysuit underneath adds a light layer without much bulk: short-sleeved as it starts to cool, long-sleeved for colder rooms. Our clothing guide sets out what to wear at each room temperature.

A babygrow or sleepsuit is a clothing layer, so it isn't given a TOG rating of its own. TOG belongs to whatever goes over the top, whether that's a Swaddle Up™ or a sleep bag, the same way a warmth rating belongs to the duvet rather than the sheet. Choose your sleepwear TOG for the room temperature first, then use the babygrow as the layer underneath.

Zips are standard across baby sleepwear and are generally easier to manage than poppers at night. Ours include a protective zipper house at the top so the pull sits away from the skin, and flat-stitched seams throughout, which is why they suit newborn skin.

Take a mix. Two or three in the smallest size and two or three in the next size up covers most babies, since birth weight is hard to predict. Sizing on ours is based on your baby's height rather than age, and the size guide has the full measurements.