Baby Sleep Bags & Sleep Sacks | Loulou Lollipop

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Baby Sleep Bags & Sleep Sacks for Different Sleep Environments

Choosing the right wearable sleep layer starts with your baby's size and the temperature of their sleep environment. Loulou Lollipop baby sleep bags and sleep sacks are available in different TOG ratings, giving parents options for warmer and cooler room conditions.

The collection includes lightweight 0.5 TOG bamboo muslin sleep bags, 1.0 TOG TENCEL™ Lyocell sleep bags, and warmer 2.5 TOG sleep bags. Sizes range from newborn 0–6 months through toddler 18–36 months, making it easier to find an option as your little one grows.

Unlike a swaddle, a standard baby sleep sack leaves the arms free while providing a wearable layer around the body and legs. Always choose the appropriate size and TOG and follow the product's fit, layering and safe-sleep instructions.

How to Choose the Right TOG for a Baby Sleep Bag

TOG (Thermal Overall Grade) indicates the level of thermal insulation a sleep bag provides. In general, a lower TOG provides less insulation, while a higher TOG provides more.

Loulou Lollipop's collection includes three main options:

0.5 TOG: A lightweight option made with bamboo muslin and designed for warmer sleep environments.
1.0 TOG: A TENCEL™ Lyocell option that provides more insulation than 0.5 TOG.
2.5 TOG: A warmer option that provides more insulation for cooler sleep environments.

TOG should not be considered on its own. Room temperature, clothing worn underneath, your baby's comfort and the manufacturer's guidance all matter. Follow the temperature and layering recommendations provided with the individual sleep sack.

TENCEL™ & Bamboo Muslin Baby Sleep Bags

Material is another important consideration when choosing a baby sleep sack, especially when it will be worn for several hours at a time.

Loulou Lollipop offers 1.0 TOG TENCEL™ Lyocell sleep bags alongside lightweight 0.5 TOG bamboo muslin sleep bags. The collection also includes 2.5 TOG TENCEL™ options for additional insulation.

TENCEL™ Lyocell provides a soft feel, while bamboo muslin offers a lightweight option for warmer conditions. Because material is only one part of choosing sleepwear, consider the TOG rating, room temperature, size, fit and product guidance together.

How to Choose the Right Baby Sleep Sack

Start with size and fit. Loulou Lollipop offers baby sleep sacks from newborn through toddler sizes, but age alone should not determine which size you choose. Compare your baby's current measurements with the individual product's size chart.
Next, consider the room temperature and TOG rating. A 0.5 TOG option provides less insulation, while 1.0 TOG provides more and 2.5 TOG is the warmest option in the collection.
Material is another consideration. Depending on the product and TOG rating, parents can choose between TENCEL™ Lyocell and bamboo muslin options.
Finally, check the care instructions and product-specific safety information before use. The neckline and arm openings should fit according to the manufacturer's instructions, and the sleep sack should be appropriate for your baby's current size and developmental stage.

Sleep Sack vs. Swaddle: What's the Difference?

A baby sleep sack and swaddle are different types of wearable sleep products.

A swaddle wraps a young baby's body and typically keeps the arms contained during the developmental stage when swaddling is appropriate. A standard sleep sack leaves the arms free while providing wearable coverage around the body and legs.

A sleep sack can therefore be an option as babies move beyond the swaddling stage. If your baby is currently swaddled, follow current safe-sleep guidance about when to stop swaddling.

Loulou Lollipop offers Swaddle Wraps, Sleep Bags and traditional Swaddles as separate categories within its Sleep & Bedding collection, helping parents choose according to their baby's stage and needs.

Why Choose Loulou Lollipop Baby Sleep Bags?

Loulou Lollipop's baby sleep bag and sleep sack collection gives parents options across different TOG ratings, materials, sizes and signature prints.

The collection includes 0.5 TOG bamboo muslin, 1.0 TOG TENCEL™ Lyocell and 2.5 TOG options, with sizes extending from newborn through toddler. Loulou Lollipop's Sleep Bag also received a 2025 Good Housekeeping Parenting Award.

Founded in 2015 by twin sisters Eleanor Lee and Angel Kho, Loulou Lollipop is a Canadian-based, women-owned baby and children's brand. Its Sleep & Bedding collection includes products designed for different stages of a child's sleepwear routine.

FAQs

What TOG rating should my baby wear?

The appropriate TOG rating depends on room temperature, clothing worn underneath and the specific product's guidance. Lower TOG ratings provide less insulation, while higher TOG ratings provide more. Loulou Lollipop offers 0.5, 1.0 and 2.5 TOG sleep bags for different sleep environments.

Can newborns use sleep sacks?

A newborn can use a sleep sack specifically designed for their size and developmental stage when the manufacturer's requirements are met. Choose the correct size, make sure the neckline and arm openings fit as intended, and follow the product instructions and current safe-sleep guidance.

What should a baby wear under a sleep sack?

What your baby wears under a sleep sack depends on room temperature, the product's TOG rating and manufacturer guidance. Because 0.5, 1.0 and 2.5 TOG sleep sacks provide different levels of insulation, the appropriate clothing underneath can vary.

What is the difference between a sleep bag and a sleep sack?

Baby sleep bag and baby sleep sack generally refer to the same type of wearable sleep product. The terminology varies between brands and regions, but both commonly describe an arms-free wearable layer designed for sleep.

How do I choose the right size baby sleep sack?

Check your baby's current measurements against the specific product's size chart rather than choosing by age alone. Loulou Lollipop's collection includes sizes from newborn 0–6M through toddler 18–36M. Always follow the fit guidance for the individual product.

When should babies stop using sleep sacks?

There is no single age when every child needs to stop using a sleep sack. Follow the manufacturer's size, age and developmental guidance. Transition to another appropriate sleep option when your child outgrows the available sizes or the product is no longer suitable for their stage.

Is TENCEL™ or bamboo better for baby sleep bags?

Neither material is automatically better for every baby or sleep environment. Loulou Lollipop uses TENCEL™ Lyocell and bamboo muslin across different TOG options. Consider the TOG rating, room temperature, size, fit and product guidance when deciding which option is appropriate.

What is the difference between 0.5, 1.0 and 2.5 TOG sleep bags?

The main difference is thermal insulation. A 0.5 TOG sleep bag provides the least insulation of the three, 1.0 TOG provides more, and 2.5 TOG provides the most. Choose based on room conditions, appropriate clothing layers and the manufacturer's recommendations.