A Guide on Baby Knotted Onesies

Everything You Need to Know About Knotted Baby Gowns, Including What to Wear Underneath, How to Style, and Care Instructions

Between restless nights, constant diaper changes, and trying to figure out what’s best for your little one, the newborn stage can feel overwhelming. That’s why every small convenience counts, and knotted baby gowns are one of those game-changers. Soft, stylish, and thoughtfully designed, these gowns make life easier for both parents and babies.

They're perfect for those middle-of-the-night diaper changes when you're half-asleep and don't want to deal with snaps or buttons. A quick change, and your baby stays cozy and secure, ensuring a peaceful night's sleep. Plus, the fabric is gentle and breathable, ideal for a newborn's sensitive skin.

In this guide, you’ll learn about knotted onesies including why it’s so beneficial to have them in your little one’s wardrobe. We will also share advice on how to dress your baby underneath and how to wash and care for the onesie. Finally, we will answer commonly asked questions, and you will see why so many parents see them as a newborn essential. So, let’s find out how a simple clothing item like this can bring so much comfort, ease, and love into your motherhood journey.

1. What is a knotted baby gown
2. Fabrics and materials
3. Why choose a knotted onesie for your baby
4. How many newborn knotted gowns do I need?
5. Choosing the right size
6. How to put it on a baby?
7. What to wear underneath
8. Styling and matching accessories
9. Recommended product
10. Wash & Care
11. Conclusion
12. FAQs

MA-MA NYC: A Brand Built on Motherhood & Love

Motherhood is a transformative journey, filled with profound changes, and it's best navigated with the support, love, and guidance of those who have been there before. That's the driving force behind the creation of MA-MA NYC—not just a baby clothing brand, but a vibrant community of moms supporting other moms. We've experienced it all—from the joyful, rewarding moments to the challenges of sleep deprivation, breastfeeding, and adapting to new family dynamics. We understand that even the smallest details, like choosing the right baby clothes, can make a positive difference in your daily life.

Our knotted bamboo onesies are crafted from OEKO-TEX® certified bamboo, ensuring they are gentle on your baby's sensitive skin and kind to our planet. Each piece is thoughtfully designed to provide comfort and a touch of sophistication to those precious newborn moments.

When you choose MA-MA NYC, you support a brand that uplifts other moms. Every purchase helps us continue our mission to offer high-quality, beautifully crafted babywear made by moms, for moms.

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What Are Onesies?

A knotted baby gown, also referred to as ‘knotted onesie,’ is a one-piece outfit for newborns that can be used as both sleepwear and daily wear. It has original design that reminds of a sleeping sack – the bottom part is a long gown, but unlike sleeping sacks, it’s open at the bottom. This open end ties at the bottom, which allows quick and simple diaper changes. It’s versatile, can be layered, and combined with swaddles in colder climates.

It’s a great wardrobe addition, particularly during the first few months after the baby is born. During this time, you will be changing the diapers quite often, so any clothing with easy access to diaper area will save your time. It is also a great outfit for a newborn photo session or other special occasions, like sip and see gatherings.

Fabrics and Materials

When you are shopping for baby apparel, always give priority to items made of natural materials like GOTS certified organic cotton or OEKO-TEX® certified bamboo. These fabrics are gentle on your baby’s delicate skin and ensure your little one remains comfortable and has no skin irritations.

Cotton

Cotton is popular choice because its soft, breathable, and durable. It’s ideal for sensitive and delicate skin, it can be worn every day, and it’s easy to care for.

Bamboo

Apart from being extra soft and durable, bamboo is also hypoallergenic and moisture-wicking making it perfect for baby’s sin.

Material blends

Blended fabrics offer the best of both worlds. The softness of cotton pairs with bamboo’s breathability, moisture control, and antibacterial qualities to form a fabric that feels gentle on delicate skin and keeps your baby cool and comfortable.

Why Choose a Knotted Onesie for Your Baby?

For those of you who have never used a knotted onesie, you’re in for a treat. When it comes to picking the perfect garment, this is an excellent choice. It’s simple, functional, and easy to use, so it’ no wonder so many moms swear by them.

Below is a list of major benefits that make this item popular among new parents.

Comfortable, loose fit

Probably the number one reason to choose knotted gown is its incredible comfort. They are typically made from natural, breathable materials, making your baby very cozy. Newborns love the feeling of being wrapped up, just like they were in the womb, which is why they feel comforted and secure when dressed in this gentle, loose-fitted garment.

Practical - Easy diaper changes

Onesies that tie at the bottom are quite convenient and useful for moms who don’t feel like undoing a bunch of buttons or snaps in the middle of the night. With a simple knot at the bottom, you can quickly change a diaper without any hassle. With no sudden sounds and no sleep disruptions, there’s no startling reflexes and the baby will be able to remain sound asleep.

Grows with your baby

Unlike regular onesies that are quickly outgrown, knotted gowns adjusts as your baby grows and comes in sizes for the first few months. Its distinctive design is designed to accommodate growth and allows for a range of different fits. To adjust the fit, simply tie the knot lower or higher. Don’t forget to check the size chart and read the reviews before purchase, because some brands tend to run larger or smaller.

Supports gross motor skill development

Its innovative design provides ample room for a full range of free movements, without any restrictions. Free movement and exploration are critical for the healthy development of gross motor skills, which is why you should avoid tight or stiff apparel. Your baby's legs can kick, stretch, bend, and reach, which strengthens their muscles and improves coordination.

All-season garment

There’s a reason why parents love knotted onesies. They are great for all seasons and can be worn year-round, which means that you will save money and closet space. You can find lightweight version for the summer, and warmer option for colder months. Layering is always an option, as long as you ensure optimal airflow and prevent overheating.

Picture-perfect outfit

The soft drape makes it popular choice for newborn photography sessions. It is cloud-like soft, comfortable, and cozy, so it keeps your baby cozy during the shoot. Plus, its simplistic design adds a touch of elegance and brings out the beauty of your baby.

How Many Newborn Knotted Gowns Do I Need?

Knotted onesies accommodate baby's growth, which means that you will not have to buy multiple sizes. Most manufacturers offer one size, and only a few brands have two different sizes – up to 3 months and from 3 to 6 months.

So, how many gowns do you need? It’s good to have a minimum of 3 to 7 pieces. This will allow easy garment rotation, without having to do the laundry every day.

Choosing the Right Size

Most knotted onesies are one size, intended babies up to 6 months old. However, there are certain manufacturers who offer knotted gowns in different sizes:

Preemie (up to 5 pounds)
Newborn – 3 months old (5-8 pounds)
3 months old – 6 months old (8-16 pounds)

Since all babies grow at their own pace, you should consider your baby’s size, weight, and length to determine which size to buy. You should also refer to brand’s sizing charts and read customer’s reviews to see what other parents say about the particular brand.

Keep in mind that it’s better to have a size slightly bigger than the one that’s too tight. These gowns should be loose fitting; plus, you should anticipate and accommodate further growth.

How to Put Onesie on a Baby

Dressing your baby in a knotted gown is quite straightforward, though it might take a little practice, especially for first-time moms. Once you get the hang of it, you'll find it to be a convenient and comfortable option for your little one.

Start by gently lifting the baby and sliding the gown over baby’s head. Most models have wider neck, so it won’t be too hard to do it. Slide the arms through the sleeves and cover the legs.

Next, tie the knot at the bottom by gathering the excess fabric and tying it into a loose knot. Make sure it’s sung, but not too tight. It has to allow free leg movement (such as kicking). Don’t leave too much loose fabric because it could pose a hazard.

Finally, you need to monitor the baby for signs of discomfort and fussiness to promptly react and adjust temperature.

If you're placing your baby in a car seat, make sure the knot is secure and no fabric bunches up behind the back or between the straps. You can gently tuck any loose tails around the legs after buckling for comfort, but always prioritize a snug and secure harness fit.

What to Wear Underneath

Most infant clothing, including knotted gowns, is crafted from soft and breathable materials, making layering dependent on the temperature. Always check the back of your baby's neck to ensure they're neither too warm nor too cold and are dressed appropriately. In warm weather, a diaper alone under the gown is sufficient. When it's cooler, consider adding a short-sleeved onesie underneath. For chilly conditions, opt for a long-sleeved footie to keep your newborn cozy and comfortable.

Styling & Matching Accessories

If you are seeking a stylish look, you can add matching accessories such as hats or headbands to create cohesive and adorable outfits. They also provide additional warmth, especially when the weather is cold.

Matching hat

Get creative with mixing knotted onesies with other clothing items such as hats to create cute outfits for your little one!

Bows

You can also add a matching bow or a headband to complete the look and to keep your newborn warm.

Swaddle

For extra coziness, you can add swaddle blanket in the same print to complete the look. Learn more about swaddles.

Recommended Product

Lilly Knotted Bamboo Onesie my MA-MA NYC is thoughtfully crafted for newborns with delicate skin, offering the softest touch they deserve. Free from harsh chemicals, these garments are feathery-soft and perfectly tailored for newborns. The classic design is ideal for those first photos, while the open bottom that ties in a knot allows for quick and easy diaper changes. This piece of clothing truly has it all—comfort, practicality, safety, and style.

Material: OEKO-TEX® certified bamboo
Size: One size
Fit: Loose fit
Care instructions: Machine wash cold; gentle cycle

SHOP HERE

Wash & Care

Always follow manufacturer’s care instructions because different materials have different care requirements and with proper care the garment will remain soft and snuggly after each wash. Here are a few general guidelines on washing baby apparel:

Machine wash in cold cycle or hand wash in mild water
Use gentle cycle to avoid fabric damages
Use mild, baby-friendly detergents
Avoid using harsh chemicals, bleach, or fabric softeners
Wash similar colors together to avoid color bleeding
Use mesh bags to further protect the item
If needed, wash inside out (iron on reverse)
Hang to dry or tumble dry on low heat

Conclusion

With its timeless classic design and soft fabric choices like bamboo or organic cotton, knotted onesies are a must have in any baby’s wardrobe. They make quick and simple diaper changes and maximum convenience for both you and your baby. Apart from being functional, they are also stylish, which makes them a valuable addition to any baby’s wardrobe. Let your infant enjoy the same level of comfort and style of these delightful garments. Visit MA-MA NYC web shop today.

Frequently Asked Questions

1. What do babies wear under onesies?

If the temperature is warm, a baby doesn’t have to wear anything except the diaper underneath. If the weather is cool or cold, another layer can be added – a short sleeved onesie or a long sleeved and long legged footie.

2. How many knotted onesies should I get for my newborn?

It’s advisable to have at least 3, and ideally 7 knotted gowns in your newborn’s wardrobe. This way you can have enough pieces for comfortable laundry routine, considering potential messes and recurring diaper changes.

3. Are they safe?

Yes! Knotted gowns are considered safe for babies, but the gown must fit properly and the knots must be tied safely, without a lot of excess fabric, in order to prevent potential dangers.

4. When should I transition my baby from a gown to a regular onesie?

In general, babies outgrow knotted gowns around 3-6 months of age. Since every baby grows at their own pace, it’s important to keep a close eye on their development. You may transition when you notice more kicking, needing more room or rolling over. When the gown unties due to constant movement, it’s time to transition.

5. Can I use a swaddle over a gown?

Certainly! The snug fit pairs perfectly with blanket and adds warmth during cold weather. Keep in mind that you have to check baby’s neck from time to time to make sure they are comfortable.

6. How do I know if a baby is comfy in a knotted onesie?

To determine if your little one is too hot or too cold, it's best to feel the back of their neck. If you notice signs of sweat, it means the baby is too warm, and you should remove a layer of clothing. When the temperature is just right, the neck will feel warm. Next, check their feet and hands; they should feel cool to the touch. If they are cold, consider adding another layer or some socks. Additionally, observing your baby's behavior can be a great indicator of their comfort level. For instance, a fussy baby might signal that some type of adjustment is needed.

7. Are onesies the same as pajamas?

Not quite. While onesies and pajamas can both be used for sleep, they serve slightly different purposes:

Onesies are one-piece garments designed for everyday wear, layering, or sleep. They are great for keeping a baby's belly covered and making diaper changes easy.
Pajamas are specifically designed for bedtime and often come in two pieces (a top and bottom), but there are also one-piece pajama styles like footed sleepers.

That said, many parents use soft, comfortable onesies for naps or overnight sleep, especially in warmer climates or under a sleep sack. So while they aren’t the same thing, they can overlap in function depending on your baby's needs and the season.

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