Sleep is the central activity of a newborn’s life. In the first months, a baby will spend more time asleep than awake — and what they wear during that time is not a trivial matter. The right sleepwear can support rest; the wrong choice can interrupt it in ways that are difficult to trace.
The most important principle in dressing a baby for sleep is temperature regulation. A newborn cannot control their own body temperature with the same efficiency an adult can, and overheating is a documented risk during sleep. The goal is to keep a baby comfortably warm — not hot. This means choosing sleepwear that insulates without sealing in heat, and avoiding the instinct to add layer upon layer on a cold night.
Natural fibres remain the best choice for nightwear. Merino wool, in particular, is exceptional: it regulates temperature across a wide range, wicking moisture away from the body when a baby is warm and insulating when the temperature drops. Organic cotton is softer against sensitive skin and breathes well in warmer months. Both are preferable to synthetic fleece, which traps heat and can cause a sleeping baby to overheat without obvious signs.
Fastenings matter more at night than at any other time. In the early weeks, a parent may be dressing and undressing a baby multiple times after midnight. Garments with too many buttons, poorly placed snaps, or complicated closures become real obstacles in a darkened room with tired hands. The ideal sleepwear opens and closes simply, from the bottom, without disturbing the baby any more than necessary.
At AVONTAÉ, our approach to sleepwear begins with the same questions we apply to all our garments: What does the body need during this time? What will allow the deepest, most undisturbed rest? The answers lead consistently to simplicity — fewer seams against the skin, a gentle fit that allows movement without bunching, and materials that breathe with the body through the long hours of the night.
A well-rested baby is a developing baby. Sleep is not passive; it is when growth consolidates, when the nervous system integrates, when the body repairs itself. Dressing for that work with the same care we bring to daytime is not overcomplication — it is the quiet, practical expression of attention.