Babies' Base Layers

Wrap your little ones in warm comfort with babies' base layers. On winter strolls, our merino wool models hold thermal heat, and the collar opens with shoulder snaps to slip over a baby's head.

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Thermal babies' base layers for cozy winter days

Protect your toddler from winter chills with soft thermal underwear. Knit with highly breathable synthetic microfibers, these base layer pants and tops quickly trap warm air while drawing body moisture away from sensitive skin. The flatlock seams and tagless necklines prevent irritation under heavy snowsuits.

Top or bottom: which one first?

The top covers the chest, enough for a stroller ride, while the bottoms are better suited once baby starts walking outside. Layering the two is what Decathlon suggests for cold days.