Baby Thermal Onesie
Baby Thermal Onesie
Baby Thermal Onesie
Baby Thermal Onesie
Baby Thermal Onesie
Baby Thermal Onesie
Baby Thermal Onesie
1/7

Baby Thermal Onesie

$39.00
$39.00
Save $-39.00 Sold out
Shipping calculated at checkout.
Size: 0-3mths
Color: Toi-Toi
In stock
  • Temperature regulating
  • Incredibly Soft
  • Machine Washable
Fabric
100% Australian Merino Wool
  • 18.5 Microns
  • 220 GSM
  • Non-Mulesed Wool
Features & Details
  • Envelop neckline is designed for easy dressing either over the head or up over the feet
  • Three snaps for easy changing
  • Babies are often still learning to regulate their own temperature and Merino wool is naturally temperature regulating
  • Wool is moisture wicking, keeping baby dry from teething and spit up
  • Fit is true to size
  • Wear with Baby Thermal Bottoms for extra warmth
  • No harmful chemicals used in the dying process
  • Woolmark® certified Merino wool, ensuring it meets strict performance and sustainability standards
Care
  • Machine wash on delicate cycle with warm/cool water.
  • Mild soap. Do not use bleach.
  • Wool wash is recommended, Eucalan
  • Hang dry, best to lay flat to help retain shape.


Note: Merino wool is naturally odor & stain resistant, no need to frequently wash.
  • Ethically Made in Vancouver, Canada
  • Free Shipping Over $200
  • Easy 60-Day Returns

Comfort Meets Sustainability

Merino wool is a renewable resource, making it one of the most sustainable fabrics available. With access to grass and water, their fleece naturally regenerates each year, providing a continuous and sustainable source.

Learn More

Feel good about dressing your family in Simply Merino

Temperature Regulating

Merino wool naturally insulates in the cold by trapping air and keeps you cool in the heat by absorbing and releasing moisture.

Incredibly Soft

Merino wool is soft because its ultra-fine fibers—typically 18–24 microns—are smoother and gentler against the skin than regular wool.

Machine Washable

Merino wool’s naturally crimped fibers and smooth surface help it retain shape and resist shrinking, especially when washed gently with cool water and a wool-safe detergent.

Wicks Away Moisture

Merino wool keeps you dry by wicking moisture away from your skin and absorbing it into the fibers without feeling wet.

Hypoallergenic

Merino wool naturally wicks moisture and resists bacteria and dust mites, helping reduce allergen buildup.

Naturally Fire Resistant

Merino wool is naturally fire-resistant, thanks to its keratin-rich fibers and moisture content, which cause it to smolder rather than ignite.

Durable

Merino wool is durable because its fine, strong fibers are naturally elastic, allowing them to bend without breaking.

Biodegradable

Merino wool is fully biodegradable—cut it into small pieces and compost in soil, where it naturally breaks down within 12 months and enriches the earth.

LEARN ABOUT MERINO WOOL

Customer Reviews

Based on 22 reviews
91%
(20)
0%
(0)
5%
(1)
0%
(0)
5%
(1)
K
Katherine

Excellent quality, lovely colour, great hand feel. Kept my little one very comfortable while camping.

K
Katherine

I’m really pleased with these onesies. They’re excellent quality and they feel great. My little one was extremely comfortable despite camping in fluctuating temperatures.

C
Chantal Wall
Great product!

Ordered the baby thermal onesie and pants and we love them! Great quality, thin, warm and fits easily under a fleece pyjama. Looking forward to purchasing some more!

K
Kaili Clay
Simply the best

Love these onesies for my pukie drooling baby!
I can go all day without changing his clothes as the wet, drool and puke wipe off easily, and then the fabric dries fast. Also amazing for outdoor play as they keep him dry and warm. Garment construction, and material is also really good.
We love our merinos.

T
Taryn Pritchard
Great quality - cute and cozy

It is so cute and cozy, and works great as a base layer on cold days that also works as a full outfit once we’re inside. Will definitely order more when she outgrows it. Excellent quality.

123

Frequently Asked Questions

How should I store my wool?

If you are not wearing your wool regularly, we recommend storing it in a cedar chest or in a sealed Ziploc bag.

How should I wash my wool?

Always wash your wool on a delicate cycle with a gentle detergent. Never use bleach.

How do I know what size to order?

Each product page contains a Size Chart to help you select the correct size based on body measurements. If you need any additional sizing information, please reach out to our customer service team. We know that online shopping can sometimes be frustrating, and we are always here to help!

Do moths really eat wool?

Moth and other bugs do like to nibble on most natural fibers, wool included. If you suspect you have moths, we recommend washing your wool, air dry, then freeze to kill any eggs that may be present. Storing your wool properly will prevent damage from bugs.

When will an out-of-stock item be available?

Our Fall/Winter collection gets fully restocked in September, while our Spring/Summer collection restocks in April. Small restocks are done throughout the year. Restock notifications are available through our website by selecting the size and colour you are interested in and then providing your email address.