Baby One-Pieces
Non Sale
Clear all filters
New Arrival
Baby cotton playsuit | Polo Ralph Lauren Kids
Available sizes:M 3M 6M 9M 12M 18M 24
Polo Ralph Lauren Kids
Terms and Conditions
*Extra 30% off selected sale items. In order for the discount to be applied, the total value of selected sale items must meet €300 min. value. Reduction automatically applied at checkout. Offer ends 23.07.2024, 23:59 CET.


Mytheresa is the perfect place to turn to when you are looking for something beyond more than just your standard baby clothes. Our curated offerings of luxury pieces are exactly what you need to keep your little ones looking adorable and always ready for their close up. With our series of chic designer baby onesies, your newborn is sure to put any adult’s wardrobe to shame. And as a bonus, when you invest in high-quality clothes, from the brands you love, their durability will guarantee that you can pass them down with pride.


Whether you are searching for newborn basics or a spectacular baby accessory, baby onesies are always a failsafe option. They also happen to make great baby gifts for any new parents in your life. Since babies tend to be quite messy, having to make multiple outfit changes throughout the day cannot be avoided. Building a wardrobe full of essentials that includes a wide selection of comfortable cotton onesies is necessary, and highly recommended. 

No one can resist the cuteness that is a baby in a matching set onesie. Coordinating their outfit with a bib and hat takes the guesswork out of getting them dressed and feeling cozy. The fact that they will look cute throughout the day is just a perk. No matter if you are shopping for a baby boy or baby girl, there are onesies to fit every style. Something refined like ones from Bonpoint have sweet, one-of-a-kind patterns. For a bit more edge, opt for clothing from Fendi Kids. Choose a long-sleeve onesie from Thom Browne Kids that can help them stay warm through the night.

Pint-sized fashion has evolved and even babies can look like your favorite style star or their tot. For instance, the Versace onesie has been donned by every celebrity baby; a sign that it’s meant for the coolest of toddlers. 

Discover why Mytheresa Kids is the top stop when it comes to high-fashion baby items you and your mom friends will love. Browse through our site and reach out to our expert Customer Care team for assistance.

The finest edit in luxury
Finest edit of more than 200 international luxury brands
Designer collaborations
Exclusive capsule collections that you won't find anywhere else
Fast delivery
Delivery to over 130 countries