Sleep Sacks & Swaddles

We tested muslin, flannel, and velcro swaddles to find the ones that wrap securely, breathe in warm rooms, and survive the wash.

We tested winter sleep sacks rated 2.5 TOG and in merino to find warm, safe picks for cold nurseries, from budget quilting to grow-with-baby wool.

We tested convertible and arms-up swaddles to find the ones that ease the move to arms-free sleep, plus the sizing notes that matter.

The arms-up zip sack, the three-way Velcro wrap and the muslin blankets worth buying — which newborn swaddle suits which baby and which room.

We tested sleep sacks for warmth, zippers, neck fit and wash life. Here’s what to buy for cold rooms, warm rooms and toddlers.

We tested sleep sacks from HALO, Woolino, Burt’s Bees and more to find the best pick for warm rooms, swaddle transitions and tight budgets.