Muslin Cotton Onesie

Muslin cotton onesie, the one-layer answer to hot days

A classic sleeveless onesie in double-layer muslin cotton — light enough to be the whole outfit on a hot day, soft enough to layer under everything else when the evening cools off.

This is the piece we reach for most with our own daughter, and the one we'd tell you to start with.

Why parents start here:

• One loose layer is the rule for heat. The open muslin weave lets air move across the skin, so your baby stays cool and dry instead of sweating through something thicker.
• Sleeveless on purpose. Nothing bunching under the arms, nothing to push up. Just easy movement for crawling, napping, and being carried.
• Softens with every wash. Pre-washed so it arrives soft, then it only gets better. This is the onesie that survives the daily-wash rotation.
• Flat seams for new skin. No ridges pressing red lines into a sleeping baby.

Wear it on its own in the heat, or under a playsuit when you need a second layer. Ships from Bali worldwide, with 30-day returns if the size isn't right.