Baby Singlets vs Bodysuits: Which Is More Practical?

Quick answer

For everyday practicality, a bodysuit wins for babies who are not yet walking because the snaps keep the base layer in place through diaper changes and crawling. A baby singlet is the better choice for quick changes, warmer rooms and older babies who are mostly upright. Many parents keep both and choose based on the day.

A singlet and a bodysuit can look almost identical on the hanger, but they behave very differently once they are on a wriggling baby. The choice affects how often you are pulling fabric back down, how easy nighttime changes feel and how well a base layer sits under the rest of the outfit.

This comparison looks at the real trade-offs between the two styles using the details that actually matter: fastening, fit, fabric and layering. It also points to specific NICO pieces so you can see how each option works in practice.

The core difference: fastening and coverage

A bodysuit fastens at the crotch, usually with press studs, so the fabric stays anchored to the body. A singlet is open at the bottom and simply pulls on over the head or steps into. That single design difference drives almost everything else, including how the garment behaves during a diaper change and how often it rides up.

For a baby who is lying down, rolling or crawling, the anchored fit of a bodysuit means less fabric bunching around the waist and fewer gaps at the back. A singlet is faster to put on and take off, which matters when you are changing a baby many times a day, but it can shift out of place more easily.

• Check the fastening before you buy: press studs at the base are what keep a bodysuit in place.
• If you choose singlets, look for a roomy fit so the hem does not dig in when your baby sits or bends.

Fit and sizing: what to check on each style

Fit matters more than style for comfort. A bodysuit should be snug enough that the snaps stay closed without pulling, but not so tight that it presses on the legs or shoulders. Because the base is anchored, a bodysuit that is slightly too small will show up quickly as tension at the crotch or difficulty fastening the studs.

A singlet has more tolerance for growth because there is no crotch fastening to strain. The trade-off is that a singlet that is too large can slip off the shoulders or bunch under clothing. Look at the neckline and armholes: an extended, vintage rib crew neck gives a bit more room to move without gaping.

• For bodysuits, size to the torso rather than the age on the label.
• For singlets, a roomy fit is usually more comfortable than a close one.

Diaper changes and everyday handling

This is where the two styles separate most clearly. A bodysuit with press studs at the base lets you change a diaper without pulling the whole garment over your baby's head. That is a genuine advantage at night or when you are changing a baby who does not want to lie still.

A singlet is quicker to remove entirely, which can be useful if the garment gets wet or soiled. But because it is not anchored, it can ride up during handling and leave the lower back exposed. If you are dressing a newborn, the bodysuit's fastening usually saves more time across a full day.

• Count the press studs: three studs at the base, as on the Tee Onesie, give a secure closure.
• Keep a spare singlet in the diaper bag for quick swaps when a bodysuit would be overkill.

Layering: which works better as a base layer

Both styles work as a base layer, but they layer differently. A bodysuit creates a smooth, tucked-in line under pants, sleep bags and sweaters because the base stays anchored. That makes it the more reliable choice when you are adding several layers for cooler weather.

A singlet is easier to add or remove on its own, which suits warmer rooms or days when the temperature shifts. Because it is open at the bottom, it also creates less bulk at the waist if you are layering under a fitted bottom. The trade-off is that it can shift out of place as you dress your baby in the next layer.

• For cold-weather layering, start with a bodysuit and add a singlet only if you need extra warmth.
• For warm rooms, a single singlet layer is often enough on its own.

Fabric and care: what to look for

Fabric choice affects how the garment feels against skin and how it holds up to washing. Organic cotton is a common base for both styles because it is soft and breathable. Plant-based dyes, used across several NICO pieces, can shift slightly between batches, so expect small colour variations rather than a flaw.

Care is broadly similar for both: wash gently and avoid high heat to protect the fibres and the dye. Bodysuits have one extra consideration because the press studs and the crotch seam take more strain, so check the fastening area for wear as your baby grows.

• Expect slight colour variation in plant-dyed pieces; it is a normal part of the process.
• Check bodysuit snaps and seams regularly for strain as your baby gets bigger.

The trade-offs, side by side

• Diaper changes: A bodysuit with press studs, like the Tee Onesie - Rose, lets you change a diaper without removing the whole garment. A singlet must be pulled off entirely. Choose a bodysuit if speed and less disruption matter most.
• Fit and movement: A bodysuit stays anchored to the body, so it is less likely to ride up. A singlet, such as the 3 Pack of Baby Singlets, is roomier and easier to pull on but can shift out of place. Choose a singlet if you want a relaxed fit and quick dressing.
• Layering: A bodysuit creates a smooth, tucked-in base under pants and sleep bags. A singlet is easier to add or remove on its own but can bunch under fitted layers. Choose a bodysuit for cold-weather layering and a singlet for warm rooms.
• Care and longevity: Both styles wash similarly, but bodysuit snaps and crotch seams take more strain over time. Plant-dyed fabrics may vary slightly between batches. Check bodysuit fastenings regularly and size up as your baby grows.

How NICO pieces compare

• 3 Pack of Baby Singlets: Pack includes 3 baby singlets in your choice of colour, with a boxy tank style, extended vintage rib crew neck and a roomy fit. Colours are derived from plant sources such as vembadam bark for lilac and tacoma flowers for lemon. A three-pack covers several changes a day, and the roomy fit and rib neck give growing babies room to move without the singlet digging in.
• Tee Onesie - Rose: Boxy tee onesie with an extended vintage rib crew neck, roomy fit and 3 brass press studs at the base. Made from 100% organic cotton, ethically made in India, and also available in discounted packs of 3 and 5. The three press studs make diaper changes faster without pulling the garment over the head, and the pack options lower the cost per piece if you use bodysuits daily.
• Last Chance Ramona Tee Bodysuit: Made from Tencel Modal in a minimalist cut, designed to give a tucked-in tee look with a smooth profile that moves with the body. Model wears size M. A smoother, more streamlined bodysuit option for parents who want a neat base layer under everyday outfits rather than a bulky one.
• Last Chance Gwen Bodysuit - Mauve: One-piece bodysuit with an elasticated waist, adjustable straps and snaps, and picot elastic trim. Made from plant-dyed organic cotton pointelle (95% organic cotton, 5% elastane). Last Chance items are final sale and cannot be returned. The adjustable straps and elasticated waist give a more customisable fit than a standard pull-on style, but the final-sale policy means you should check sizing carefully before buying.

Which should you choose?

Best for

• Newborns and babies who are not yet walking, because the anchored fit of a bodysuit stays in place through changes and crawling
• Parents who want fewer disruptions at night, since press studs allow a diaper change without removing the whole garment
• Cold-weather layering, where a smooth tucked-in base makes adding layers easier

Not for

• Parents who want the fastest possible dressing and undressing, where a singlet is quicker
• Warm rooms or summer days when a single light layer is enough
• Babies who are mostly upright and mobile, where a singlet's roomier fit may be more comfortable

There is no single winner for every family. A bodysuit is the more practical base layer for babies who are lying down, crawling or being changed often, while a singlet suits quick changes, warmer rooms and older babies on the move. Many parents find a mix of both works best, so start with the style that matches your baby's current stage.