The Lightest, Most Breathable Sleep Sack for Safe Sleep — Swaddelini (Only 0.2 TOG)

Sleep safety is the number one priority at Swaddelini.
That’s why every Swaddelini is designed to keep your baby cool, comfortable, and safe, even on warm nights.

Why TOG Matters for Safe Sleep

Temperature is a key factor in safe infant sleep. That’s why we rigorously test all our products for TOG (Thermal Overall Grade) — a measure of how much warmth a fabric provides.

Swaddelini sleep sacks range from 0.2 to 0.34 TOG, making them among the lightest and most breathable baby sleep sacks available.

Our Air Light Swaddelini has a TOG of just 0.21, helping your baby stay cool while still feeling gently hugged for comfort and security.

A lower TOG rating means a sleep sack provides less insulation, helping prevent overheating, one of the most important aspects of sleep safety. Because babies can’t tell us when they’re too warm, a lightweight, breathable sleep sack helps regulate their temperature naturally.

 Choosing the Right Sleep Sack for Your Baby’s Room Temperature

61°F–68°F (Cool room):
Layer two cozy pajamas under your Swaddelini Original or Bamboo for warmth.

68°F–75°F (Comfortable room):
Any Swaddelini works well. At 68°F, add a fleece pajama set; closer to 75°F, just a diaper is enough.

75°F–81°F (Warm room):
Use the Air Light Swaddelini, the lightest, most breathable sleep sack with a TOG of 0.21. If the room is above 81°F, do not use a sleep sack or swaddle to avoid overheating.

Our airlight swaddelini is the lightest on the market with a TOG of 0.2 

How to Check if Your Baby’s Temperature Is Right

Touch the back of your baby’s neck with two fingers:

If it feels sweaty or damp, remove a layer.

If it feels cool, add a pajama layer before putting the Swaddelini back on.

Safe Sleep Starts with Swaddelini

From our ultra-light 0.2 TOG Air Light Sleep Sack to our gently compressive knit design, every detail is crafted to help your baby sleep safely and soundly.

Learn more about Swaddelini sleep sacks and get answers to your questions on our FAQ page.