---
product_id: 710808609
title: "Woolino 4 Season Baby Sleeping Sack, Australian Merino Wool, Adjustable 2-24 Months Size Fits Infants & Toddlers"
brand: "woolino"
price: "$706.59"
currency: USD
in_stock: true
reviews_count: 5
category: "Woolino"
url: https://www.desertcart.us/products/710808609-woolino-4-season-baby-sleeping-sack-australian-merino-wool-adjustable
store_origin: US
region: United States of America
---

# 100% Australian Merino Wool lining Adjustable size fits 2-24 months GOTS certified organic cotton outer Woolino 4 Season Baby Sleeping Sack, Australian Merino Wool, Adjustable 2-24 Months Size Fits Infants & Toddlers

**Brand:** woolino
**Price:** $706.59
**Availability:** ✅ In Stock

## Summary

> 🐑 Sleep Smarter, Grow Together — The Only Sleep Sack Your Baby Needs!

## Quick Answers

- **What is this?** Woolino 4 Season Baby Sleeping Sack, Australian Merino Wool, Adjustable 2-24 Months Size Fits Infants & Toddlers by woolino
- **How much does it cost?** $706.59 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/710808609-woolino-4-season-baby-sleeping-sack-australian-merino-wool-adjustable)

## Best For

- woolino enthusiasts

## Why This Product

- Trusted woolino brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sustainable Luxury:** Crafted with organic cotton and biodegradable packaging for eco-conscious families.
- • **One Size, Endless Growth:** Adjustable snaps and zippers ensure a perfect fit from 2 months to 2 years—no more size guessing.
- • **Effortless Parenting Hack:** Two-way zipper and closable seat-belt slots make diaper changes and transfers seamless.
- • **Year-Round Comfort Mastery:** Merino wool naturally regulates temperature, keeping baby cozy in any season.
- • **Award-Winning Sleep Solution:** Trusted #1 rated sleep sack with multiple parenting awards since 2010.

## Overview

The Woolino 4 Season Baby Sleeping Sack combines premium Australian merino wool and organic cotton in a single adjustable size that fits infants and toddlers from 2 months to 2 years. Designed for year-round use, it naturally regulates body temperature to reduce sleepless nights, features easy-access zippers and snaps for hassle-free diaper changes, and is backed by multiple parenting awards and certifications. Durable, breathable, and eco-friendly, it’s the ultimate sleepwear investment for modern parents seeking comfort, convenience, and sustainability.

## Description

Are you worried about which weight sleep bag to use and whether your baby will be too hot or cold while sleeping? With Woolino there is no need to worry because exceptionally breathable merino wool naturally regulates baby's body temperature to ensure s/he sleeps comfortably through the night. This luxurious baby sleeping bag will also save you buying lots of different sizes and TOG ratings as it comes in one standard size that fits babies 2m - 2yrs old and it can be used year-round. • 100% natural: Silky-soft Australian merino wool lining & organic cotton outer. One universal size, 2mo -2yrs. For smaller babies simply close the underarm snaps to adjust the fit. Can be used in all seasons - suitable for room temp. 63-75F (17-24C). Unlike any other fiber, merino regulates body temperature keeping baby warm when it's cold and cool when it's hot. Zipper-pull guards to protect child’s skin and discourage child from chewing on the zipper pull. Opens completely flat for easy dressing. Machine washable. Can be tumble-dried. Nursery thermometer with dressing guide included. Beautifully packaged in 100% biodegradable gift box. Woolmark certified merino. OEKO-Tex 100 certified fabric and accessories (tested for harmful substances). Also available in toddler size 2-4 years Why Merino? A study done by University of Sydney, Australia has found that a better night's sleep is achieved when sleeping in or under wool. Significantly finer than other types of wool, merino is the perfect fiber to have next to child's sensitive skin. It breathes, regulates temperature, manages moisture, it is easy care and durable. It is naturally perfect.

Review: Ótimo saco de dormir - Um ótimo saco de dormir. Serve para todo o ano o que evita comprar vários sacos com tog diferentes. O caro sai barato. Pena não haver na desertcart as outras opções:dos 0-6 meses, dos 6-18.
Review: Best sleepsack - After trying many sleep sacks, I was tired of constantly thinking about TOG values, size/length, and having back ups for washing. I bought a Woolino and haven't looked back. They are roomy but customizable to fit baby. They have snap closures at the shoulders so if you have a baby that hates putting their arm through the armhole, these are great. The extra room for growth also means room for movement when my baby is settling and self soothing with some wild movements in the crib. He never gets tangled in it and hasn't seemed too hot, though we haven't used this in the summer yet. I've washed a few times and it has held up well. Dryer with no heat only, and once in desperation to get the laundry done quickly I did a moderate spin cycle instead of gentle, and it stood up fine. I compared it to a new one that I had bought as a backup and didn't see any shrinkage after washing in this manner. We had some spit up/throw up/drooling mishaps and there was no staining, but I did wash promptly following any breast milk debris being on it. Very high quality feel. The merino wool has withstood a lot of kicking and pulling from my baby getting his feet up and pulling down on it, stretching and causing friction to the layers. You would never know. Zippers never catch or get caught on the material. Snaps never feel weak or weaken the fabric they are attached to. FYI had it for 3 months and my son is 6 months old. Used swaddle Up, ergo pouch, and halo sleep sacks previously.

## Features

- #1 RATED and #1 SELLING merino wool baby sleep sacks in US and Canada since 2010. Creative Child's 2018 Top Choice of the Year Award & winner of 2021 Cribsie Award and Mom's Choice Award
- REDUCE OR ELIMINATE SLEEPLESS NIGHTS - When baby sleeps better, so do parents. PREMIUM FABRICS for best comfort: Australian merino wool lining - 100% natural, luxuriously soft, and temperature regulating. GOTS certified organic cotton outer
- THE ONE AND ONLY sleep sack your baby will need until they turn two. UNIVERSAL SIZE: 2 months – 2 years. 4 SEASON USE: Merino wool regulates body temperature so it can be used year-round.
- MAXIMUM VERSATILITY - double shoulder snaps and two-way zipper system for easy dressing and diaper changes; Closable seat-belt slots for easy transfer between stroller, bouncer, crib, etc. Under-arm snaps allow this wearable blanket to grow with your baby and make it the perfect swaddle transition product
- PREMIUM QUALITY - Buy with confidence from Woolino, a trusted US company, offering US customer service and industry leading warranty for your peace of mind. The industry leader in merino wool baby essentials since 2010.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004FFJNAY |
| Additional product features | Breathable |
| Awards won | 2012 Creative Child Top Choice of the Year, Amazon.com #1 Rated Sleep Sack, Mom's Choice |
| Batteries required | No |
| Best Sellers Rank | #27,767 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #367 in Baby Boy's Clothing #481 in Baby Girls' Clothing |
| Care instructions | Machine Wash |
| Customer Reviews | 4.7 4.7 out of 5 stars (4,104) |
| Dishwasher safe | No |
| Is Discontinued By Manufacturer | No |
| Is portable | No |
| Item Weight | 1.1 pounds |
| Item model number | FO-04EP-2DAS |
| Material Type | 100% Merino Wool Lining / 100% Organic Cotton Outer |
| Minimum weight recommendation | 11.02 Pounds |
| Number Of Items | 1 |
| Product Dimensions | 12.7 x 9.9 x 1.7 inches |
| Style | Transitional |
| Target gender | Unisex |

## Images

![Woolino 4 Season Baby Sleeping Sack, Australian Merino Wool, Adjustable 2-24 Months Size Fits Infants & Toddlers - Image 1](https://m.media-amazon.com/images/I/814Td+LR7lL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Ótimo saco de dormir
*by D***A on 30 July 2025*

Um ótimo saco de dormir. Serve para todo o ano o que evita comprar vários sacos com tog diferentes. O caro sai barato. Pena não haver na Amazon as outras opções:dos 0-6 meses, dos 6-18.

### ⭐⭐⭐⭐⭐ Best sleepsack
*by B***H on 24 March 2025*

After trying many sleep sacks, I was tired of constantly thinking about TOG values, size/length, and having back ups for washing. I bought a Woolino and haven't looked back. They are roomy but customizable to fit baby. They have snap closures at the shoulders so if you have a baby that hates putting their arm through the armhole, these are great. The extra room for growth also means room for movement when my baby is settling and self soothing with some wild movements in the crib. He never gets tangled in it and hasn't seemed too hot, though we haven't used this in the summer yet. I've washed a few times and it has held up well. Dryer with no heat only, and once in desperation to get the laundry done quickly I did a moderate spin cycle instead of gentle, and it stood up fine. I compared it to a new one that I had bought as a backup and didn't see any shrinkage after washing in this manner. We had some spit up/throw up/drooling mishaps and there was no staining, but I did wash promptly following any breast milk debris being on it. Very high quality feel. The merino wool has withstood a lot of kicking and pulling from my baby getting his feet up and pulling down on it, stretching and causing friction to the layers. You would never know. Zippers never catch or get caught on the material. Snaps never feel weak or weaken the fabric they are attached to. FYI had it for 3 months and my son is 6 months old. Used swaddle Up, ergo pouch, and halo sleep sacks previously.

### ⭐ This is NOT a 4 season sleeping bag
*by Z***I on 9 January 2025*

I can only share what other people wrote. This is NOT a 4 season sleeping bag I trusted the recommendations but this sleeping bag is rather thin and I found my baby crying and very cold in this at night, so she consequently was sick for a few days! I feel really disappointed, definitely not worth the price!

## Frequently Bought Together

- Woolino 4 Season Baby Sleep Bag - Merino Wool Baby Sleeping Bag, 2-24 Months, Navy Blue
- WaterWipes Plastic-Free Original Baby Wipes, 99.9% Water Based Wipes, Unscented for Sensitive Skin, 720 count (Pack of 12)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-16*