Researched, not hands-on tested. Specs checked on the manufacturer’s website on October 25, 2026. How we research products.
Your baby is done with the swaddle, or never liked it, and the blanket question is back: what keeps them warm without anything loose in the crib? The HALO SleepSack Wearable Blanket is the name most registries suggest. This page covers which size to buy, how warm the cotton version is, and who should pick something else, using only HALO’s own specs and the American Academy of Pediatrics (AAP) safe sleep advice.
More on nights and naps: our baby sleep guides.
Quick answer: is the HALO SleepSack Wearable Blanket worth it?
It suits parents who want a simple, arms-free wearable blanket for a warm room or summer nights: 100% cotton, 0.5 TOG, with a zipper that opens from the bottom. It does not suit a cool nursery on its own, or a newborn who still settles best swaddled. It has no swaddle wings.
HALO SleepSack Wearable Blanket specs (from HALO)
| Spec | HALO SleepSack Wearable Blanket, 100% cotton |
|---|---|
| Product name on HALO’s site | Wearable Blanket 100% Cotton TOG 0.5 |
| Fabric | 100% cotton |
| Warmth | 0.5 TOG |
| HALO TOG guide for 0.5 TOG | 75°F to 77°F, “summer / warm rooms” |
| Zipper | Inverted zipper with a zipper cover |
| Fit note from HALO | “Extra roomy; size up less” |
| Sizes offered on this product page | Small, Medium, Large |
| Newborn (0 to 3 months) | 19 to 23 in, 5 to 10 lb (on the SleepSack size chart) |
| Small (0 to 6 months) | 23 to 26 in, 10 to 18 lb |
| Medium (6 to 12 months) | 26 to 30 in, 16 to 24 lb |
| Large (12 to 18 months) | 30 to 35 in, 22 to 28 lb |
| XL (18 to 24 months) | 35 to 40 in, 26 to 36 lb (on the SleepSack size chart) |
| Care | Wash before first use; machine wash cold, gentle cycle; tumble dry low; close the zipper and turn inside out |
You can see the current prints, sizes and price on the HALO 100% Cotton Wearable Blanket page.
Which size to buy
HALO sizes the SleepSack by both length and weight, and the ranges overlap: Small goes up to 18 lb and Medium starts at 16 lb. Go by your baby’s current length and weight, not the month on the label. HALO itself says the sack is extra roomy and that you should “size up less”, so buying two sizes ahead is not what the maker suggests.
The chart lists a Newborn and an XL size, but the cotton print we checked was offered in Small, Medium and Large only. If you need Newborn or XL, check which prints come in that size before you order.
What it does well (according to HALO)
These points are the manufacturer’s own claims, not our findings:
- Replaces a loose blanket. HALO calls it “the original wearable blanket for safe sleep” and “the next step after swaddles”. The AAP also says you can use a wearable blanket if you are worried about your baby getting cold.
- Night diaper changes. HALO says the inverted zipper makes diaper changes easier, with a zipper cover to prevent irritation.
- Room for the hips. HALO describes a roomy, extra-long sack and says it is approved by the International Hip Dysplasia Institute.
- Light fabric. HALO says the 100% cotton fabric is breathable.
Its limits
- One warmth level. This cotton version is 0.5 TOG only. In a cooler room you need warmer clothes underneath or a higher-TOG sack. Our sleep sack TOG chart matches TOG to room temperature.
- Two temperature ranges on one page. HALO’s TOG guide puts 0.5 TOG at 75°F to 77°F, but the same product page also says it is “perfect for 68°F to 77°F”. We go by the TOG guide and the AAP rule of one layer more than you would wear.
- Not a swaddle. The arms are free. A newborn with a strong startle who is not yet showing signs of rolling may settle better in a swaddle for the first weeks.
- Sizes vary by print. Not every print comes in every size on the chart.
Safety notes (AAP and CPSC recall check)
- Back to sleep for every sleep, on a firm, flat surface, with no blankets, pillows, toys or bumpers in the crib (AAP). Our safe sleep guide has the full checklist.
- Your baby only needs one more layer than you would wear in the same room, and the AAP says overheating can increase the risk of SIDS.
- Do not use weighted blankets, sleepers or swaddles (AAP). This HALO sack is not weighted.
- Recall check, October 25, 2026: we searched CPSC and news and found no recall of the current HALO 100% cotton wearable blanket.
- Older HALO notices, for warning only: HALO SleepSacks with pink satin flowers (2013, petals could detach; sold only at Babies “R” Us from 2011 to 2013). If you were handed down an older sack with flower trim, check that notice.
- A separate HALO product, the HALO Dream Magic Sleepsuit, was recalled in March 2026 because the zipper head can come off. It is a sleepsuit, not this wearable blanket.
Who should pick an alternative
- A newborn who settles best wrapped and is not showing signs of rolling: see our best swaddles for newborns.
- A baby starting to roll whose parents want a gradual step: read the HALO Easy Transition SleepSack review.
- Not sure which type you need? Our sleep sack vs swaddle guide compares the two.
- A cool nursery: a higher-TOG sleep sack, chosen with the TOG chart above, rather than layering extra blankets.
Moving out of the swaddle right now? Our guide on when to stop swaddling has a step-by-step plan.
Related: Burt's Bees Beekeeper wearable blanket review.
Related: sleep sack for toddlers: sizes, climbing out and when to stop.
Related: HALO vs Woolino sleep sack comparison.
Frequently asked questions
Use your baby’s current length and weight on HALO’s chart: Small is 23 to 26 in and 10 to 18 lb, Medium is 26 to 30 in and 16 to 24 lb, Large is 30 to 35 in and 22 to 28 lb. HALO says the sack is extra roomy, so it advises sizing up less.
The cotton version is 0.5 TOG. HALO’s TOG guide lists 0.5 TOG for 75 to 77°F, for summer or warm rooms. The product page also mentions 68 to 77°F. In a cooler room, add warmer pajamas underneath or choose a higher-TOG sack.
HALO’s SleepSack size chart includes a Newborn size for 19 to 23 in and 5 to 10 lb, though not every print comes in it. The AAP says sleep sacks that do not swaddle and let your baby move freely can be used as long as you want.
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Sources
- HALO: Wearable Blanket 100% Cotton TOG 0.5 product page (with TOG guide), checked October 25, 2026
- HALO: SleepSack Wearable Blanket size chart, checked October 25, 2026
- AAP HealthyChildren.org: A Parent’s Guide to Safe Sleep (last updated September 11, 2026), checked October 25, 2026
- AAP HealthyChildren.org: Swaddling: Is it Safe? (last updated July 15, 2022), checked October 25, 2026
- CPSC: HALO SleepSacks Wearable Blankets Recalled (2013)
- CPSC: HALO Dream Recalls Magic Sleepsuits Due to Choking Hazard (2026)
This page is general information, not medical advice. Product details can change; check the label and HALO’s current instructions. Talk to your pediatrician about your baby’s sleep.