Wool vs Cotton for Baby Skin — Which Is Really Better?

If you've been told cotton is always best for babies, that's half-true. Cotton is great for layers in direct contact with the skin most of the day. Wool, however, beats cotton at temperature regulation — and it's what every culture in cold climates has wrapped their newborns in for 5,000 years.

Here's when to choose each, and the myths to ignore.

What Wool Actually Does

Wool fibres have a crimped structure that creates thousands of tiny air pockets — these trap body heat when cool and wick moisture when warm. That's why a merino baby jumper keeps babies comfortable in a 10°C outdoor walk and a 24°C café.

The "Scratchy Wool" Myth

Old-generation wool was scratchy because fibre diameter was thick (30+ microns). Modern baby wool — especially the hypoallergenic yarn we use — is 18-19 microns, similar to the diameter of human hair. Softer than most cotton T-shirt fabric.

Where Cotton Wins

For bodysuits, rompers, and anything worn under other layers all day — cotton wins. It's easy to wash, doesn't pill, and tolerates frequent hot washes (baby laundry happens often).

Where Wool Wins

For outer layers: beanies, booties, cardigans, and blankets. Wool holds up to 30% of its weight in moisture before feeling wet, which matters for drooly babies and cool weather.

The Hypoallergenic Question

Pure wool contains lanolin which can trigger reactions in babies with pre-existing wool sensitivity (rare). Hypoallergenic baby wool is processed to remove allergenic proteins — all Woolly Wonders yarn is hypoallergenic and safe on sensitive newborn skin.

The bottom line

Use both. Cotton for what's next to the skin all day. Wool for the pieces that do the heavy lifting on temperature — which, in an Australian climate, is most of the year for beanies and at least 6 months for cardigans.