How to Dress a Baby for Spring (Without the Stress)

Spring babies are magical but dressing them can be stressful.

One minute it's all sunshine and lollipops, the next there's a really cold breeze and suddenly you're second guessing every layer. This year has been the same, 23 degrees Celcius in London one day, 12 the next. I remember this so clearly with my own spring baby. The unpredictability felt like a lot, especially in those early weeks when everything already feels new. So much airtime is given to feeding and sleeping but dressing a baby for warmth and comfort feels just as challenging for most parents and caregivers. Everyone has an opinion on it too, "Do you want to put some socks on her?" and "Ooh is he looking a little flushed," are well meaning but not always helpful to newbie parents still working on their confidence.

Coming from New Zealand, I had something that made a huge difference for my son and my confidence: merino wool. That peace of mind, knowing my brand baby was warm but not overheating when he was wearing merino wool, was invaluable. And allowed me to confidently check my boy regularly but also mostly ignore the passive aggressive comments when they inevitably came my way!

Why Spring Dressing in the UK Feels So Tricky

Spring sits right in that awkward in-between:

• Mornings and evenings are usually chilly, under 10 degrees Celcius
• It can appear to be stunning sunshine and blue skies but the temperatures don't match how warm it looks to be out the window
• Midday can feel warm, especially in the sun, even though the average is only 15 degrees Celcius
• Modern heating systems are confused or turned off so indoor temperatures aren't as predictable or manageable
• Indoor and outdoor temperatures can vary massively so layering can be annoying
• Breezes can be brutally cold from the North and East, catching you out

Why it's so Important for Babies According to Science

Let's not sugarcoat it, major health organisations and researchers consistently identify overheating as a common and significant risk factor in sudden infant death syndrome cases. So dressing your baby correctly is incredibly important to get right - just bundling them up so they don't get cold is not the answer. Considering what the layers are and monitoring your baby's body temperature can be life saving.

Babies cannot regulate their body temperature as efficiently as children and adults, they develop that ability over the first six to twelve months. If the environment around them, including what they're wearing and wrapped in, is particularly warm or particularly cold, their bodies natural response isn't as developed or efficient at naturally returning to a healthy body temperature. Essentially, their little bodies are learning to work with the outside world to keep themselves a healthy body temperature so getting layers right really matters.

As adults, our bodies very quietly but constantly do quite a lot to keep our body temperature at a safe and comfortable level - from our blood vessels dilating to changing hormones released, we often don't notice the background work our body is doing until we are full blown sweating or have goosebumps. Babies are developing all of this.

And babies use a lot more energy as they try to get it right, to warm themselves up or cool themselves down. Babies naturally produce more heat in a few different ways for different reasons but they also have much thinner skin that loses more heat so what they wear and are wrapped in to maintain a healthy body temperature is much more complex than most of us realise.

When babies are dressed appropriately to maintain a healthy body temperature in whatever environment they're in, they are more comfortable, sleep more deeply and essentially put their energy to better use than trying to thermoregulate so they also put on more weight. The Cambridge Maternity Hospital and the Lancet Study on Low Birth Weight Babies both proved this.

The scientific understanding of wool's thermoregulatory properties has been developed over centuries through a series of progressive discoveries but one of the most recent by the North Carolina State University confirms again that merino wool naturally maintains thermal equilibrium.

The Foundation: Start with the Right Base Layers

If there is one thing I would recommend, it is to start with warm, natural fibres, close to the skin. Surprise, surprise, the best option here is merino wool!

For spring, this simple combination works beautifully as a foundation:

 

• A merino wool vest bodysuit
• Merino booties or socks
• When outside or colder indoors, a lightweight merino beanie

This combination covers the key areas:

• Chest for core warmth
• Feet which get cold quickly
• Head where babies can lose a lot of heat when outside or colder indoors

From there, you can build up depending on the environment and time of the day. For mornings and evenings or cooler days, more merino wool, and middle of the day or the first scorchers, cotton onesies or outfits are great.

Knowing you have those key areas covered with merino wool is such a great base to build from. 

Why Merino Works So Well for Babies

Merino wool is a bit of a parenting secret weapon, especially in unpredictable weather or environments.

It is:

• Thermoregulating, helping keep baby warm and cool
• Breathable, reducing overheating
• Moisture wicking, keeping skin dry
• Naturally soft and gentle on sensitive skin

Of course merino wasn't solely responsible for my own baby’s weight gain but although he was born average weight we then had a rocky start with tongue tie and other early challenges and he lost more than ten percent of his birth weight initially. For anyone who has been there, it's stressful and difficult. But, by ten weeks, he had climbed into the 90th percentile.

Did merino help? This is only opinion but I genuinely think it played a part, especially when it came to comfort and sleep. And that added comfort and sleep ended up applying to me as well!

The Key: Flexible Layers, Not Heavy Ones

The goal is not to bundle your baby up in a big, awkward mess, it is to have the right base layers and then adapt quickly.

Spring dressing is all about:

• A warm, breathable layer against their skin
• Easy to remove layers
• Breathable fabrics - no fleece needed in a British spring!!
• Covering key areas without overdoing it

When your baby’s core, head and feet are supported with natural fibres, everything else becomes much simpler to manage.

A Thought From One Parent to Another

If you are feeling unsure, you are not alone. Spring can feel like a guessing game. But having a reliable base, especially something like merino, takes a lot of that stress away.

For me, it meant one less thing to worry about in those early weeks. And that is huge. Because when your baby is comfortable, you can relax a little more too.

Spring Baby Gift Guide

If you are buying for a new arrival or updating your own baby’s wardrobe, these are the pieces that really make a difference in spring.

Swaddles and blankets

Lightweight merino swaddles and blankets are perfect for this time of year. They provide warmth without overheating and can be layered easily in a pram or used for naps at home.

They are also incredibly versatile, working as a swaddle, feeding cover or an extra layer when temperatures drop. And the joy of how lightweight they are is a small win - you have enough stuff and bulk going on with a baby, this is a true win.

Everyday essentials

A good merino vest, socks and a soft beanie are the foundation of any spring wardrobe. These are the items you will reach for daily and they make layering simple and stress free. See above for more details!

A special outfit for 6 to 12 months

As babies grow, having one beautiful, practical outfit for outings or special moments is lovely and can also be really practical. If the parents already have a child they are likely to have kept all the newborn clothes, so getting some larger clothes will be really well received. And better still, preparing for cooler weather in about six months time!

Look for something soft, breathable and easy to move in. A merino set or a thoughtfully designed outfit that works across changing temperatures will get far more wear than something overly seasonal. Something like our Warm & Wild Bundles!

It is the kind of outfit that feels special but is still completely practical for real life.

Simple, breathable layers, natural fibres and the flexibility to adapt. That is really all you need.