TOG rating chart in °F: which sleep sack TOG for each room temperature
In shortTOG is the warmth rating on a sleep sack's label. We found no US government source that uses it, so Cotokim's chart pairs each room temperature with the TOG one sleep sack maker lists: 2.0 TOG for 64 to 68 °F (18 to 20 °C), 1.5 for 68 to 72 °F (20 to 22 °C), 1.0 for 72 to 75 °F (22 to 24 °C) and 0.5 for 75 to 77 °F (24 to 25 °C), where that chart stops; above that, the bodysuit alone on the hottest nights. For a room below 64 °F (18 °C), add a layer of clothing under the sack, never a blanket.
A sleep sack, or wearable blanket, keeps your baby warm with nothing loose in the crib: the NICHD lists it as one way to keep a baby warm without adding items to the sleep area 3. Its TOG rating, printed on the label, says how warm it is. On the maker's chart we read, the TOG goes up as the room gets cooler, from 0.5 for 75 to 77 °F to 2.0 for 64 to 68 °F 2.
At 70 °F (21 °C), the band is 68 to 72 °F (20 to 22 °C).
During the day
Bodysuit, short or long sleeve, with pants or a light sleeper.
For sleep
Bodysuit and a light sleeper inside a 1.5 TOG sleep sack.
Sleep sack: 1.5 TOG, from one maker's chart. Source: HALO (sleep sack maker).
Cotokim proposal. We did not find a room temperature in degrees, or TOG ratings, in the U.S. government safe sleep pages we read (NICHD Safe to Sleep and the CDC). They ask you to dress your baby for the room and to watch for signs of overheating. The temperature bands and the clothes in this table are a Cotokim proposal; the TOG column is the chart of one sleep sack maker. Source: NICHD Safe to Sleep, CDC.
Check on your baby
- Dress your baby for the temperature of the room they are in. Source: NICHD Safe to Sleep.
- Sweating or a hot chest are signs that your baby is too hot: take off a layer. Source: CDC, NICHD Safe to Sleep.
- Too many layers of clothes and bedding for the room temperature can overheat a baby, and overheated babies are at higher risk of SIDS. Source: NICHD Safe to Sleep.
For safe sleep
- For sleep, keep your baby's head uncovered. Source: CDC.
- Take your baby's hat off when you are indoors. Source: NICHD Safe to Sleep.
- For warmth in the crib, use a wearable blanket or an extra layer of clothing. The crib holds only a fitted sheet. Source: NICHD Safe to Sleep, CPSC.
- No weighted blankets or weighted swaddles, and no other weighted objects in your baby's sleep. Source: CPSC, NICHD Safe to Sleep.
- Stop swaddling at the first sign that your baby is trying to roll over, at any age. NICHD says to stop when babies start rolling over; Cotokim follows the earlier sign. Source: NICHD Safe to Sleep.
A guide, not a rule: every baby is different. Feel your baby's chest and adjust. For a premature or sick baby, follow your baby's care team.
Cotokim's list counts the clothes for each size by your city's climate and your due date.
Build my list for my cityThe chart
| Room temperature | Sleep sack TOG | What your baby wears to sleep |
|---|---|---|
| below 64 °F (18 °C) | not in the chart | Long-sleeve bodysuit and a footed sleeper inside a sleep sack of 2.5 TOG at most. No blanket and no hat. |
| 64 to 68 °F (18 to 20 °C) | 2.0 | Bodysuit and a sleeper inside a 2.0 TOG sleep sack. |
| 68 to 72 °F (20 to 22 °C) | 1.5 | Bodysuit and a light sleeper inside a 1.5 TOG sleep sack. |
| 72 to 75 °F (22 to 24 °C) | 1.0 | Short-sleeve bodysuit or a light sleeper inside a 1.0 TOG sleep sack. |
| 75 °F (24 °C) or more | 0.5 | Short-sleeve bodysuit, with or without a 0.5 TOG sleep sack. On hotter nights, the bodysuit alone. |
We did not find a room temperature in degrees, or TOG ratings, in the U.S. government safe sleep pages we read (NICHD Safe to Sleep and the CDC). They ask you to dress your baby for the room and to watch for signs of overheating. The temperature bands and the clothes in this table are a Cotokim proposal; the TOG column is the chart of one sleep sack maker.
Where the numbers come from
- The TOG column is one maker's chart: 2.0 TOG for 64 to 68 °F, 1.5 for 68 to 72 °F, 1.0 for 72 to 75 °F and 0.5 for 75 to 77 °F 2. Cotokim's temperature bands follow those ranges.
- below 64 °F (18 °C), the chart we read has no TOG: it starts at 64 °F 2. Cotokim's proposal is your warmest sleep sack with a layer of clothing under it: for warmth, a wearable blanket or an extra layer of clothing 3, never a blanket on top.
- Above 77 °F the chart stops 2. Cotokim's proposal for the hottest nights is the bodysuit alone, with or without the lightest sack.
- The clothes under the sack in each band are a Cotokim proposal.
- No US government source we read uses TOG. The NICHD and the CDC talk about the room and the signs of heat 3 1, not about a rating. Check the chart on the label of the sack you buy: Cotokim read one maker's chart.
Choosing a sleep sack
- No weight. The NICHD lists weighted blankets, weighted swaddles and other weighted objects among the things in the sleep area that can pose dangers for your baby 3, and the CPSC says not to use weighted blankets or weighted swaddles 4.
- No hood. Keep your baby's head and face uncovered during sleep 3.
- Nothing else in the crib. Nothing but a fitted sheet in a crib, bassinet or play yard 4.
- A higher TOG is not safer. Too many layers of clothes and bedding for the room temperature can overheat a baby, and overheated babies are at higher risk for SIDS 3.
Frequently asked questions
What TOG for 68 degrees?
A room at 68 °F falls in Cotokim's band of 68 to 72 °F (20 to 22 °C), with a 1.5 TOG sleep sack: Bodysuit and a light sleeper inside a 1.5 TOG sleep sack.
What TOG for 70 degrees?
A room at 70 °F falls in the band of 68 to 72 °F (20 to 22 °C), with 1.5 TOG: Bodysuit and a light sleeper inside a 1.5 TOG sleep sack.
What TOG for 72 degrees?
A room at 72 °F falls in the band of 72 to 75 °F (22 to 24 °C), with 1.0 TOG: Short-sleeve bodysuit or a light sleeper inside a 1.0 TOG sleep sack.
What TOG for 65 degrees?
A room at 65 °F falls in the band of 64 to 68 °F (18 to 20 °C), with 2.0 TOG: Bodysuit and a sleeper inside a 2.0 TOG sleep sack.
Is a higher TOG better in winter?
Match the TOG to the room your baby sleeps in, not to the weather outside, and watch for signs of heat 3. A heated room in winter can call for a lighter sack than the weather suggests.
Source credits
Material from the Centers for Disease Control and Prevention (CDC) is available at no charge on cdc.gov. Our use of it, including links to CDC pages, does not mean that the CDC, the U.S. Department of Health and Human Services (HHS) or the U.S. Government endorses Cotokim. Reference to specific commercial products, manufacturers, companies, or trademarks does not constitute its endorsement or recommendation by the U.S. Government, Department of Health and Human Services, or Centers for Disease Control and Prevention.
Courtesy: Eunice Kennedy Shriver National Institute of Child Health and Human Development. Safe to Sleep® is a registered trademark of the U.S. Department of Health and Human Services.
We link to pages of the U.S. Consumer Product Safety Commission (CPSC) in our own words; this does not mean that the CPSC endorses Cotokim.
Brands appear only for the charts of their own products (sizes, packs, TOG). Cotokim has no deal with any brand.
Written by the Cotokim teamChecked by the Cotokim team against the sources on this page, on October 14, 2026
Sources
- Centers for Disease Control and Prevention (CDC), Providing Care for Babies to Sleep Safely. Read on October 14, 2026.
- HALO Innovations, sleep sack maker, What TOG values are SleepSack Wearable Blankets available in?. Read on October 14, 2026.
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), NIH, Ways to Reduce Baby's Risk (Safe to Sleep). Read on October 14, 2026.
- U.S. Consumer Product Safety Commission (CPSC), Safe Sleep: Cribs and Infant Products. Read on October 14, 2026.