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The Sleep Store

The Sleep Store Premium Winter Cotton & Merino Sleeping Bag

SKU:
1C-WMOC-SB
Availability:
2026-04-26
Gift wrapping:
Options available
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Features:
Front Zip
Type:
Sleeping Bags
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Colour Bucket:
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category_filter:
Sleeping Bags & Suits
Made From:
Cotton
Made From:
Merino
Excluded Free Shipping:
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Archived:
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Organic:
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Made From:
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Size Bucket:
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Size Bucket:
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Age Suitability:
Babies 0-3 months
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Colour Bucket:
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Size Bucket:
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Size Bucket:
3-24 months
Size Bucket:
2-4 years
Size Bucket:
3-6 years
Age Suitability:
Babies 3-6 months
Age Suitability:
Babies 6-12 months
Age Suitability:
Kids 1-2 years
Age Suitability:
Kids 2-3 years
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Colour Bucket:
Purple
Type:
Winter Essentials
Type:
The Sleep Store - Premium Collection
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$69.00 - $142.45
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Estimated Back In Stock Date: 26 April 2026

Product Description

Details

At The Sleep Store, we love to find and create amazing products that help children sleep better. We strongly believe that layers of merino and organic materials such as cotton are an essential tool in helping children sleep better, especially going into the cooler months. 

We give you the Premium Winter Cotton & Merino Sleeping Bag. A warmer version of our loved Midweight Sleeping Bag. This bag was designed with warmth, flexibility and durability in mind! Ideal for cooler rooms (designed for temperatures below 16°C, and suitable through to 25°C with appropriate layering), this sleeping bag combines premium materials with practical design.

Crafted from two layers of natural fibres, the outer layer is made from a beautifully thick, brushed fleece cotton, finished in our signature prints, while the inside is lined with our deluxe merino for natural warmth and breathability. It combines the softness and breathability of cotton with the temperature-regulating magic of merino wool. 

Unlike traditional quilted sleeping bags, this bag has a soft, smooth feel with a gentle stretch, making it especially comfortable for little ones who may not enjoy bulkier styles. It allows for natural movement while still keeping warmth in, helping your child settle more easily and sleep more comfortably. A one-way zip running from top to bottom makes night-time changes simpler, while underarm snaps help you adjust the fit for smaller babies or those between sizes. It’s a thoughtful balance of warmth, flexibility, and durability.

Available in 4 sizes - 0-6 months, 3-24 months, 2-4 year and 3-6 years, this sleeping bag grows with your baby through those busy toddler years. 

Why do we love Merino so much? Known as the 'miracle fibre' when it comes to infant sleep, Merino wool is a naturally temperature-regulating and moisture wicking fibre. It will help to keep your little one warm in winter but also cool in the warmer months without waking up clammy. It has the ability to naturally lock away odours, releasing them when washed or aired - this can mean less washing... yay! Merino is also naturally fire retardant. Of course we recommend keeping your children well away from any heaters and fires ("a metre from the heater!") but Merino is a naturally low fire danger fabric.

Premium Collection
This beautiful item is part of our lovely Premium Collection. These are made in a small GOTS certified factory in India.

Add a FREE Room Thermometer with handy clothing guide to your cart with every purchase of The Sleep Store Sleeping Bags or Sleeping Suits!

The Sleep Store Room Thermometer - New Zealand

The Sleep Store Room Thermometer - Australia

Awards
OHBaby! Awards 2024 - SILVER WINNER - Best Baby Merino - The Sleep Store
OHBaby! Awards 2022 - SILVER WINNER - Best Baby Merino - The Sleep Store

Fire Safety
This product complies with the Product Safety Standard (Children’s Nightwear and Limited Daywear Having Reduced Fire Hazard) Regulations 2016 and  Safety Standard AS/NZS 1249:2014 (Children's Nightwear and Limited Daywear having Reduced Fire Hazard).



Highlights

  • Warm winter comfort: Designed for colder rooms below 16°C, with flexible use up to 25°C when layered.
  • Premium cotton & merino: Brushed fleece cotton outer with soft merino lining for natural warmth and breathability.
  • Temperature regulating: Merino helps keep your child warm without overheating or feeling clammy.
  • Soft, flexible feel: Non-quilted design with gentle stretch for comfortable movement and better sleep.
  • Easy night changes: One-way zip and underarm snaps allow quick changes and an adjustable fit.
  • Grows with your child: Available in sizes from newborn to 6 years for long-lasting use.

Sizing Information

Sizing Chart



SizeHeight/LengthChestArmholeWidth
0-6 months75cm60cm30cm46cm
3-24 months100cm72cm34cm47cm
2-4 years118cm76cm38cm50cm
3-6 years125cm80cm42cm52cm

About our sizing
Our own brand garments follow the Australasian standard AS1182-1997 for sizing and are made with room to grow. Our Size 2 clothing for example is made to fit the standard’s average sized 2.5 year old comfortably.

Please note - Measurements are taken when garments are laid flat. Areas such as chest, and armhole are calculated at twice the width to get the full measurement.

Materials & Care

Materials


Merino sleeping bags, bedding, swaddles and clothing are easy to care for when following the correct guidelines. Please see our care instructions included with your garment.

Fabric
Inner Layer - 250gm 100% Merino Wool
Outer Layer - 300gm 100% Brushed Fleece Organic Cotton
Woolmark Rich Blend - 19.5 Microns
Certified STANDARD 100 by OEKO-TEX
Washing
Gentle (wool cycle) machine or hand wash in cold or 30°C water with liquid wool wash
Drying
Dry immediately - lay flat or hang dry
Do not tumble dry

I'm naturally fluffy

These garments are naturally fluffy but washing separately for the first few washes will help the natural wool fibres on the inside to settle and will free any excess fluff.

Care for your merino

As with many wool garments, you may experience a bit of pilling on this garment. Please note this is often due to a soft fibre such as merino rubbing against other fabrics, such as flannelette sheets. We consider pilling a normal part of wear and tear on a soft merino garment. We could have treated the fabric much more to reduce pilling but then it would lose its lovely, snuggly softness.

Please take care with moths

Protect your Merino from small holes created by insects such as moths and silverfish. Ensure your garments are clean before storing. Lavender and Cedar wood are noxious to these pests so storing your garments with these scents or a moth trap will help protect your knitwear further.


Love your Merino and it will love you back!


Care for your Wool

As with many wool garments, you may experience a bit of pilling on this garment. Please note this is often due to a soft fibre such as merino wool rubbing against other fabrics, such as flannelette sheets. We consider pilling a normal part of wear and tear on a soft merino wool garment. We could have treated the fabric much more to reduce pilling but then it would lose its lovely, snuggly softness.

Please take care with moths

Protect your Wool from small holes created by insects such as moths and silverfish. Ensure your garments are clean before storing. Lavender and Cedar wood are noxious to these pests so storing your garments with these scents or a moth trap will help protect your knitwear further.


Love your Merino and it will love you back!

What are the major differences between The Sleep Store Merino Wool garments?

Basics Merino
Our entry level 100% Merino Wool. At 190gsm it is the lightest weight of our 100% merino wool offerings but not as fine (or silky smooth to touch) as our Deluxe Rib or Jersey Merino.  It is a great affordable and durable option.
All Seasons Merino Tencel 
This is an everyday collection made from a 70% Merino Wool / 30% Tencel. The Jersey blend fabric has a silky, cool feel, and is the lightest Merino wool blend option at 165gsm. The Tencel blend makes it great for wearing all year round and ideal for sensitive skin.  
Jersey Merino 
Made from 100% New Zealand merino wool, it is super smooth and soft. It feels like high-quality t-shirt fabric and has a comfortable stretch - not as much as the Deluxe Merino rib. Great for layering all year round at 200gsm. 
Deluxe Merino Rib
Made from 100% New Zealand merino wool, this range uses a rib knit merino wool, meaning its structure consists of rows of stitching. This gives this merino wool a beautiful stretch with cross-grain elasticity. It is so soft and great all year round at 220gsm. 
Fleece Merino Tencel
Super warm at 270gsm, ideal for cold nights and Wintry days. Made from a blend of 68% Merino Wool, 29% Tencel and 3% Elastane, this range is super soft and fluffy on the inside with a sweatshirt feel on the outside. 
Premium mid-weight Merino 
A beautiful soft and thick 100% Merino Wool interlock which allows for comfortable stretch whilst retaining shape.  A lovely warm option, at 250gsm it is our warmest 100% merino options.  This is our only 100% merino that is available in prints.  
Merino Knitwear
Crafted from 100% merino wool. Comes in 3 different stitch patterns depending on the garment - seed stitch, classic stitch and brioche stitch. 


Shipping & Returns Information

Fast Shipping - In stock, ready to ship!

We offer fast, economical shipping to Australia, dispatched every week day from our Auckland, New Zealand warehouse. All items on our website are in stock, ready to dispatch (excludes pre-order). Please allow 3-5 working days for main centres, 5 working days for outside of main centres and up to 8 working days for heavy or bulky orders.

Shipping starts from $12 for small items. Just add your items to your cart and use the Shipping Estimator in the Mini Cart or Cart with your post code. Please double check your shipping in the checkout, particularly for large items which the estimator doesn’t accurately calculate.

All packages are sent with New Zealand Post and delivered by Australia Post.

Packages are labelled with a Signature with Authority to Leave if they are less than $300 value so delivery doesn’t require you to be home. Please let us know if you need Signature Required for security concerns.

Free Shipping for orders over $100* (excludes large items)

Free shipping is available when you spend over $100! Please note bulky or heavy items are excluded from this offer and you can confirm the correct shipping at the checkout. Unfortunately our Cart Shipping Estimator does not accurately exclude large items from free shipping calculations. We apologise for any inconvenience with this technical limitation.

Go to Shipping & Delivery Page

Hassle-free Returns for 365 Days!

We have expert staff available to help you choose the perfect item – how can we help before you purchase? However, when you do purchase something that doesn’t fit or isn’t quite right, we offer an excellent returns policy and the best possible customer service.

We also know life with babies and children is busy, so you have up to 365 days for your returns and exchanges to come back to us:

  • Up to 90 days from purchase - You can return for an Exchange, Store Credit or Refund
  • Up to 365 days from purchase – You can return for an Exchange or Store Credit

Returned items must be received back in perfect condition, unused and unwashed condition including the instructions and packaging. Please ensure you carefully package items so they are received back in perfect condition.

Our Returns and Exchanges page has full details, including product specific returns information and our Returns Form.

Go to Returns Page

Brand Information
The Sleep Store
We're thrilled to bring you our own brand range of baby and family sleep essentials. We have developed our range of natural fibre bedding & clothing with parents in mind, to offer fabulous quality and great value. Our organic cotton bedding and wool underlays is award winning and top rated by our customers. Our aim is for The Sleep Store products to be the best on the market. The Sleep Store range is designed and developed in house by our own team and now includes baby sleeping bags, bedding, merino clothing, organic cotton clothing, cots, bassinets and more. We are all parents and know what fabrics and features make life easier for parents, and great for little ones to use.

Frequently Bought Together

The Sleep Store Premium Winter Cotton & Merino Sleeping Bag

$69.00 - $142.45
The Sleep Store Premium Winter Cotton & Merino Sleeping Bag
Colour:
Grey
Blush Garden
Green Woodland
Size:
0-6 months
3-24 months
2-4 years
3-6 years