Are weighted sleep sacks safe?

What the evidence says

Canadian and U.S. health authorities agree: weighted sleep sacks, weighted swaddles, and weighted blankets should not be used for babies. Health Canada specifically tells parents to stay away from weighted swaddles, sleep sacks and blankets, and notes there's no research supporting swaddle sleep sacks in general. In the U.S., the CDC and American Academy of Pediatrics say the same thing, and the Consumer Product Safety Commission found that weighted sleep products are linked to concerning drops in infant oxygen levels, which if sustained could harm a baby's developing brain.

Following pressure from pediatric groups, major retailers like Amazon and Target have stopped selling weighted infant sleep products, and Target recalled hundreds of thousands of weighted blankets after two infant deaths. The core problem is that any weight on or around a sleeping baby can restrict breathing or movement, especially since babies can't reposition themselves the way older children or adults can. Regular (unweighted) sleep sacks that are properly fitted are the recommended alternative to a loose blanket, since babies don't need blankets for sleep and loose bedding is a known suffocation risk.

Bottom line: skip anything marketed as 'weighted' for sleep, whether it's a sack, swaddle, or blanket. Use a lightweight, well-fitted sleep sack instead, dressed appropriately for room temperature, with your baby on their back on a firm, flat surface.