Merino Long Sleeve Bodysuit

Navy merino blue baby onesie with long sleeves on a white background

NZ Made

Babu

Merino Long Sleeve Bodysuit

$47.78

A long sleeve merino bodysuit for babies in 18.5 micron superfine merino, reinforced under the snap domes so it lasts. Soft, lightweight and non-itch.

Ideal under clothes, or teamed with leggings and a sleeping bag at bedtime. Warm and comfortable right through the year rather than only in winter.

100% superfine merino wool at 18.5 micron, with reinforcement under the snap domes.

Body length is 41.5cm at three to six months and 45cm at six to twelve months. Reinforced doming area at the crotch.

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Fast and reliable delivery

Easy returns

Real people, ready to help

About Merino Wool

One of nature's most versatile fibres, merino is a natural insulator and temperature regulator, keeping you warm in the cold and cool in the heat. With ultra fine fibres, it's incredibly soft not at all scratchy like traditional wool can be.

Insulating

Antimicrobial

Lightweight

Temperature regulating

Moisture wicking

Non-irritating

Quick drying

Soft and gentle against delicate skin
Naturally breathable and temperature regulating
Lightweight warmth without bulk

Merino wool is naturally breathable and helps regulate body temperature across changing conditions.

Merino wool is naturally temperature regulating, breathable and soft against the skin. Its odour-resistant fibres often require less frequent washing than synthetic alternatives.

Cool water and a gentle wool wash will help maintain the softness and performance of the fibre. Always refer to the care label attached to your garment.

Sized by age, with a comfortable fit that leaves room to move, play and grow. Soft and easy to get on and off, so dressing a wriggly little one is a little simpler.

Every child grows at their own pace, so go by your child's size rather than their age. If they're between sizes, we recommend choosing the larger one.

Always check the size guide on the individual product page before selecting your size

We dispatch every order from Nelson, New Zealand with tracked delivery, and your local postal service completes the final leg. Delivery times vary by destination, and customs processing can add a few extra days.
Our prices are in New Zealand dollars and don't include New Zealand GST. They also don't include import duties, taxes or handling fees charged in your country. If these apply, they're set by your local authorities and payable by you before or on delivery. If your parcel is genuinely lost in transit, we'll replace or refund it.

If your purchase isn't quite right, you can return it within six months for an exchange, replacement or refund. Simply return it in as-new condition with its original tags and packaging.

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100% New Zealand Merino Wool

100% New Zealand merino for little ones
Soft and gentle on delicate skin
Breathable warmth without overheating

Babu keeps things simple and soft for babies, with merino that breathes and regulates as the day changes. Gentle against delicate skin, it's an easy layer for sleep, play and everything in between.

About Babu

Founded in New Zealand, Babu creates thoughtfully designed clothing and essentials for babies and young children. Using premium natural fibres including GOTS-certified organic cotton and New Zealand merino wool, the brand focuses on comfort, quality and timeless design. Made for everyday family life, Babu products are designed to be practical, durable and gentle on delicate skin.

All warmth, no itch

Merino wool is valued for its ability to naturally regulate temperature, helping keep you comfortable in both cool and warm conditions.

Its ultra-fine fibres are soft against the skin, while its breathable structure helps manage moisture and resist odour build-up. Because merino naturally stays fresher for longer, garments often need less washing than synthetic alternatives.

When cleaning is required, gentle care will help preserve the fibre's softness and performance.

Care Instructions

Please refer to the care label attached to your garment. Wash in cool water using a wool-safe detergent, either by hand or on a gentle wool cycle. Reshape while damp and dry away from direct heat. Do not tumble dry unless stated on the garment label.

Hand wash

Gentle machine wash

Mild detergent

Air dry

Do not tumble dry

Baby & Children's Size Guide (cm)

Based on 75th percentile sizing for a comfortable fit for most babies and children.

Size	Premature (00000)	Newborn (0000)	0-3 Months (000)	3-6 Months (00)	6-12 Months (0)	1 Year	2 Year	3 Year	4 Year	5 Year	6 Year	8 Year	10 Year
Weight (kg)	2.5	4	6	8	10	12	14	17	20	24
Height (cm)	50	56	62	69	76	82	92	99	106	113	116	128	140
Chest (cm)	-	41	44	47	50	52	54	56	58	60	61	66	72
Waist (cm)	-	41	43	45	47	49	51	53	55	57	58	61	63

How to measure

Measure your child rather than a garment, over a nappy or underwear, keeping the tape level and snug but not tight. Every child grows at their own pace, so go by their measurements rather than their age. If they're between sizes, choose the larger one.

Height - Measure from the top of the head to the heels, lying flat for babies or standing against a wall for older children.
Chest - Measure around the fullest part of the chest, under the arms.
Waist - Measure around the natural waist, just above the belly button.

Our quality guarantee

We carefully select products made from premium natural fibres and stand behind their quality.

Every product we sell is guaranteed. If something is faulty, damaged or isn't what you ordered, contact us at returns@nznature.co.nz and we'll put it right. A photo helps us sort it quickly.

If you have any concerns about a product, we're always here to help.

Returns, exchanges & refunds

We understand that sometimes a product isn't quite right.

Return within six months of your order date.
Items should come back As New, with tags and original packaging. Try something on as you would in a shop, but not worn beyond that.
Return postage is at your own cost. We don't charge you postage to send a replacement out.
Refunds go to your original payment method. The original delivery charge isn't included.
For an exchange of the same value it's a straight swap. Where the values differ, we refund your card and recharge for the new item.
Clearance items have a shorter window, and seconds and a few personal hygiene products can't be returned for change of mind. Where this applies, it's noted on the product page.

Please enclose the returns form that came with your order. If you're unsure about sizing or fit before you order, get in touch and we'll help you choose.

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Merino Long Sleeve Bodysuit

The measure of merino

The softness of merino wool comes down to the fineness of its fibres. That fineness is measured in microns one thousandth of a millimetre. The lower the micron count, the finer and softer the fibre. Standard wool typically measures between 30 and 40 microns. By contrast, merino measures between 15 and 24 microns.

Coarser fibres are rigid enough to prick the skin rather than bend against it, causing an itchy sensation. Finer fibres, like merino, are soft enough to flex on contact, so they sit gently against the skin without irritation.

Within merino, there's even more variation. Our superfine merino sits between 17 and 18.5 microns. It's exceptionally soft and well suited to everyday wear. Our ultrafine merino measures below 17 microns. It's rarer, more expensive and closer in feel to cashmere.

FAQs

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Not ours. The prickle people associate with wool comes from coarse fibres — the thicker the fibre, the more it irritates the skin. Our superfine Merino is 18 microns and our ultrafine is 16.9 microns, both comfortably below the threshold at which most people feel any prickle at all. The result is a fabric that feels soft next to the skin, which is why our Merino base layers suit people with sensitive skin. If wool has bothered you in the past, it was almost certainly a far coarser fibre than this.

It comes down to what you want the layer to do.

Silk is the lightest option and close to invisible under clothing. It adds genuine thermal warmth without any bulk, which makes it ideal under work clothes, under a shirt, or for travel. Choose silk when you want warmth nobody can see.

Merino is the warmest and most hard-wearing. Our superfine and ultrafine Merino sits between 16.9 and 18 microns, so it feels soft rather than scratchy, and it's naturally odour-resistant and machine washable. It's the right choice for hiking, genuinely cold days, and everyday wear.

Bamboo is soft, stretchy and breathable, and it's our most affordable range. It's better suited to everyday comfort and sleepwear than to serious warmth.

Still unsure? Email sales@nznature.co.nz and tell us what you'll be wearing it for.

Our wool is sourced from New Zealand farms committed to ethical animal welfare and sustainable land management. Merino wool is a natural, renewable, and biodegradable fibre. Combined with possum fibre—a byproduct of pest control efforts protecting native ecosystems—our fabrics support both environmental conservation and responsible production.

Yes. You can return an item for exchange within six months of the order date, provided it's unworn, unwashed and in its original condition with tags attached. Fill in the returns form enclosed with your order and send it back to us. Return postage is at your own cost, but we don't charge you postage to send the exchange item out. If the replacement is the same price, it's a straightforward swap. If the values differ, we refund your original payment method and recharge for the new item. If you're not sure which size to go for, email sales@nznature.co.nz with your order number and we'll help you work it out first.

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