Quick answer

Start with a single breathable muslin swaddle and add layers only if the room is cool or your baby runs cold. Use a room thermometer, dress your baby in a lightweight bodysuit, and check their chest or back rather than their hands. A bamboo cotton muslin swaddle is a good base layer because it is lightweight and helps regulate temperature.

Why muslin works as a swaddle base layer

Muslin is woven from fine threads that create a loose, airy structure, so air moves through the fabric while it still feels soft against skin. That breathability matters for newborn sleep because a swaddle sits directly against your baby's body for hours. A bamboo cotton blend adds a smooth, gentle feel that suits delicate skin, and the generous size of a muslin swaddle gives you enough fabric to wrap securely without pulling tight across the hips.

Layering is not about piling on blankets. It is about choosing one well-fitted swaddle and adjusting what your baby wears underneath it. If the room is warm, a nappy and a short-sleeved bodysuit may be enough. If the room is cooler, add a long-sleeved bodysuit or a lightweight sleep bag over the swaddle, but keep checking your baby's temperature rather than adding layers by habit.

What you need before you start

Set up on a flat, firm surface such as a cot mattress or a changing mat on the floor. Have one muslin swaddle within reach, a room thermometer, and a dummy if your baby uses one. Avoid loose blankets, pillows or bumpers near the sleep space. If you are using a muslin swaddle as a pram cover or nursing cover during the day, keep a separate one for sleep so it stays clean and dry.

Safe swaddling steps for newborn sleep

  1. 1. Check the room temperature first: Use a room thermometer and aim for a comfortable range, then dress your baby in a lightweight bodysuit before adding the swaddle. Common mistake: adding a thick blanket because the room feels cool to you, when your baby may already be warm enough. Checkpoint: if your baby's chest or back feels hot or clammy, remove a layer. Layer for the room, not for your own temperature.
  2. 2. Lay the muslin in a diamond shape: Spread the swaddle on a flat surface with one corner pointing down, then fold the top corner down by about a hand's width to create a straight edge for the shoulders. Common mistake: skipping the fold, which leaves fabric bunched around the face. Checkpoint: the folded edge should sit just below your baby's shoulders. A flat, even base makes the wrap easier to keep secure.
  3. 3. Place your baby on their back: Lay your baby face-up with their shoulders on the folded edge and their arms relaxed at their sides or gently bent. Common mistake: forcing arms straight down, which can feel restrictive. Checkpoint: your baby should be able to bend their knees and move their hips freely. Always start and finish with your baby on their back.
  4. 4. Wrap one side across the chest: Bring one side of the muslin across your baby's chest and tuck the edge under their opposite side, keeping the fabric smooth. Common mistake: pulling too tight across the chest, which restricts breathing. Checkpoint: you should be able to slide two fingers between the swaddle and your baby's chest. Snug but not tight is the goal.
  5. 5. Wrap the second side and secure the ends: Bring the remaining side across, tuck the end under, and fold any loose fabric away from the face. Common mistake: leaving long tails that can loosen overnight. Checkpoint: the swaddle should stay in place when you gently lift your baby. Tuck ends securely and keep fabric away from the chin.
  6. 6. Do a final temperature and comfort check: Feel your baby's chest or back, check that the swaddle is not too tight around the hips, and confirm the fabric is not covering the mouth or nose. Common mistake: assuming cold hands mean your baby is cold. Checkpoint: if your baby is sweating or flushed, remove a layer or switch to a lighter swaddle. Recheck temperature every time you put your baby down.

Muslin swaddles that suit layered sleep

  • Muslin Swaddle Blanket - Fawn & Fox Glove: Made from a premium bamboo cotton blend, this muslin is breathable, lightweight and gentle on delicate skin, with a Fawn & Foxglove print and decorative edging. The bamboo cotton blend gives you a soft base layer that helps regulate temperature, so you can add or remove clothing underneath without changing the swaddle.
  • Muslin Swaddle Blanket - Goose & the Ladybird: The construction of this bamboo cotton muslin means it is soft and comfortable for baby while helping to keep their body temperature regulated, so baby is never too hot or too cold. A temperature-regulating swaddle reduces the guesswork when you are deciding how many layers to use on a changeable night.
  • Muslin Swaddle Blanket - Vintage Floral: This generously sized muslin swaddle is described as the perfect blanket size and great for swaddling, with a vintage floral print and decorative edging. Generous sizing gives you enough fabric to wrap securely around the arms and torso without resorting to a tight, restrictive swaddle.