How to Choose the Right SleepSack TOG for Your Baby
By Bassinets ,Baby Cribs,Crib Mattress,SleepSacks,Swaddles | HALO | Published: 2026-10-24
Category: Buying Guides
Choosing the right SleepSack TOG rating ensures your baby stays comfortable and safe all night. This guide explains TOG values, fabric options, and room temperature rules to help you decide.
Quick answer
Choose a TOG 0.5 SleepSack for warmer rooms (24–27°C / 75–80°F) and a TOG 1.0 for cooler rooms (21–24°C / 70–75°F). Fabric choice—cotton vs. microfleece—adds a comfort layer but does not change the TOG rating.
What TOG means for baby sleep sacks
TOG (Thermal Overall Grade) measures a fabric's insulation. The higher the TOG number, the warmer the sack. For babies, the right TOG prevents overheating—a known SIDS risk factor—while keeping them cozy. Always pair your SleepSack with a properly fitted onesie or pajamas, not loose blankets.
Cotton vs. microfleece: more than just feel
Both TOG 0.5 and TOG 1.0 SleepSacks come in cotton and microfleece versions. Cotton is breathable and gentle on sensitive skin, ideal for year-round use in temperature-controlled homes. Microfleece adds a plush, cozy feel that some babies find soothing, but it does not change the TOG warmth—it's a texture preference, not a warmth upgrade.
Your TOG decision rules
- Room temperature 24–27°C (75–80°F): Choose a TOG 0.5 SleepSack. Pair with a short-sleeve onesie or lightweight pajamas. The cotton version (product ID 81139) is especially breathable for warmer conditions.
- Room temperature 21–24°C (70–75°F): Choose a TOG 1.0 SleepSack. Pair with a long-sleeve onesie or lightweight footed pajamas. The microfleece version (product ID 81151) adds a soft, cozy feel. Check your nursery temperature with a reliable room thermometer before choosing.
- Room temperature below 21°C (70°F): A TOG 1.0 SleepSack may still work if you layer with warmer pajamas, but HALO does not currently offer a higher TOG option. Consider adding a cotton onesie underneath and monitor your baby's chest for warmth. If your room is often below 21°C, you may need to look for a higher-TOG sack from another brand or adjust your heating.
Product facts at a glance
- Wearable Blanket 100% Cotton TOG 0.5: HALO SleepSack Wearable Blanket 100% Cotton TOG 0.5 Breathable cotton makes this a great everyday choice for warmer nurseries or year-round use in climate-controlled homes.
Wearable Blanket 100% Cotton TOG 0.5 - Wearable Blanket Micro-Fleece TOG 1.0: HALO SleepSack Wearable Blanket Micro-Fleece TOG 1.0 The plush microfleece fabric adds a soft, cozy feel that many babies find comforting in cooler rooms.
Wearable Blanket Micro-Fleece TOG 1.0
Who should choose which
Best for
- Parents in warm climates or homes that stay above 24°C (75°F) should choose a TOG 0.5 SleepSack.
- Parents in cooler climates or homes that dip to 21–24°C (70–75°F) should choose a TOG 1.0 SleepSack.
Not for
- Babies who sleep in rooms consistently below 21°C (70°F) may need a higher TOG rating than HALO currently offers.
