Unless you have lived under a rock for the past year, you are now fully aware of the growing all in one nightwear trend. The adults have taken a huge liking to this trend, however, these were originally meant for kids. These are all-in-one pyjamas with the feet being protected with a slipper like covering.

They originated in the early 19th century and were referred to as sleeper garments, or footed pyjamas. Onesie is a term that is short for one-piece. They were originally made in naturally knitted fabrics such as cotton, wool or a combination of both cotton and wool. They come with zippers that run the middle of the body all the way from the neck to the thighs. They are warm and comfortable.

It is said that wearing one feels like being inside a womb of warm fuzzy bear, no wonder they are such a comfort for children. Fleece and flannel are very popular fabrics for children.
There are many styles and designs that the onesies for kids come in and some can even come with hoodies for extra warmth. They may or may not have side pockets. Many pajamas for kids may come with a back flap to allow easy access for using the potty. Some of the foot coverings may be removable or foldable into cuffs. There are many colours these can be found in, but you can even find them in the shape of animal costumes. No doubt, these are a great hit with little kids because of their playful design.

The term onesie came as a result of the brand name that was designed specifically for infants and young children. However, the brand Onesie® was not meant to be pyjamas but rather a one-piece t-shirt with snap buttons at the crotch area. They come in both long and short-sleeves. The original Onesie® generally does not come with legs. The purpose of this style was to make it a convenient design to keep babies t-shirts tucked in place but also allow for easy access when comes nappy changing time.

It is only with time that the term has evolved to include all-in-one pyjamas as well.

There are many retailers specializing in just the legless onesies. They use logos and catch phrases on them. They are a popular tourist item that can include iconography such as I London or nobody sleeps until I sleep. They are often used as undershirts and keep children warm during winters. They are comfortable, made of soft materials and convenient clothing for children. You can buy multiples, and easily take them off and throw them into the laundry. With children, this is of course a great benefit.

The first company to produce the onesie pyjama or night drawers as they were called then was the Doctor Denton Sleeping Mills in 1865. The original onesie had buttons and not zippers. Zippers were not invented until early 20s. These night drawers or blanket sleepers became popular for older children in the 70s and early 80s because of the energy crisis of 1973 and 1979. Advertisements promoted lower heat consumption with lower thermostat settings. It arose out of a need to keep children warm and comfortable during the long winter months.

Variations of the onesie pyjamas may include the bunny suit, or the bunny pyjamas. This is usually a pink bunny costume that comes with a puffy tail, and a hood with bunny ears. Similar spin-off of these one peace includes the Japanese kigurumi (animal character costumes). These weren’t necessarily meant to be just pyjamas but costumes.

Although, the onesie is either the branded Onesie® with snap buttons, or the front zipper down all-in-one pyjamas, sometimes you can find variations that have zippers running down the side of the body. Sometimes they may come with zippers in the back instead of the front, although this is a rarity. They are made for babies who are too little to move may not come with the slip resistant soles, but rather in the same fabric as the rest of the onesie. Some  may even come with detachable feet. As mentioned earlier, some may even come with hoodies. A warmer version of the onesie may also include mittens to keep babies and children warm.