When to Use a 2.5 TOG Sleep Sack: Keeping Baby Cozy All Night Long

When your baby starts waking up more often during the night, it may be time to adjust their sleepwear. With the seasonal weather change nursery temperatures can dip in the middle of the night. That’s where a 2.5 TOG sleep sack comes in! Understanding when to use this higher TOG rating can make a big difference in helping your baby sleep safely and soundly — without overheating or waking up cold.

What Does TOG Mean?

TOG stands for Thermal Overall Grade — a measure of how well a fabric retains heat. The higher the TOG number, the warmer the sleep sack.

Here’s a quick guide:

When to Use a 2.5 TOG Sleep Sack

A 2.5 TOG sleep sack is designed for colder weather and cooler room temperatures — typically when your baby’s nursery drops below 20°C (68°F). You’ll likely reach for it:

• During fall and winter months
• In homes that run cooler overnight
• If your baby’s room feels chilly to the touch
• When you’d normally need a warm blanket (which isn’t safe for babies)
• Outdoor activities such a camping

It’s a great choice for families in Canada, where winter nights can dip well below comfortable indoor temperatures.

Pairing the Right Layers

Even with a cozy 2.5 TOG sleep sack, layering matters! Dress your baby according to the room temperature and the warmth of the sleep sack:

• 18–20°C (64–68°F): long sleeve onesie or sleeper under the sleep sack
• 16–18°C (61–64°F): bamboo footed sleeper underneath

Our bamboo sleepers are the perfect pairing — breathable, soft, and moisture-wicking, helping to regulate your baby’s body temperature even when bundled up.

Why Choose a 2.5 TOG Sleep Sack from Belan.J

With over 2000 5⭐️ reviews it no wonder our sleep sacks are a number one seller!  We thoughtfully design our sleep sacks for better sleep with your baby’s comfort and safety top of mind:

• Made from buttery soft bamboo rayon that’s gentle on sensitive skin
• Wider at the bottom for healthy hip positioning and more room to move and stretch during the night
• Breathable and thermoregulating, keeping baby warm without overheating
• Features a 2-way YKK zipper for easy nighttime changes
• Available in beautiful prints that match your nursery style

Shop 2.5TOG Sleep Sacks

The Bottom Line

If your baby’s room feels cool or it’s the middle of a Canadian winter, a 2.5 TOG sleep sack is your go-to for cozy, safe sleep. It replaces the need for loose blankets and gives you peace of mind knowing your little one is warm, comfortable, and sleeping soundly all night long.