Merino Wool Base Layers for Babies & Kids
Soft merino wool and wool-silk base layers from Engel — German family-run specialists since 1927. IVN BEST certified organic wool, gentle on sensitive baby skin, temperature-regulating for layering year-round. Tops, bottoms, bodysuits, and sets from newborn through big kid sizes.
About Engel
Why we source base layers from Engel
Engel has been making organic wool base layers for babies and children since 1927. Nearly a century of pattern refinement, construction expertise, and family-run knitting in Germany has made them the gold standard for baby base layers in Europe. Every Engel garment is IVN BEST certified — the strictest organic textile standard available, stricter than GOTS on chemical processing, animal welfare, and labor conditions. The wool and wool-silk blends they produce are among the softest and finest on the market, which is why so many parents choose them for newborns and eczema-prone babies.
What to know
Buying tips for wool base layers
Starting wardrobe: 2-3 pieces
Most parents find 2 to 3 base layer pieces per size is enough to rotate — one to wear, one in the wash, and sometimes a third as backup. Because wool needs washing far less often than cotton (every 3-5 wears instead of daily), you don't need as many pieces as you would with cotton base layers.
Size up, not down
Base layers fit close to the body by design. When between sizes, size up — wool has some give, and a slightly roomy base layer still works well under other clothes, while a too-small one is uncomfortable and wears out faster. European sizing is based on height in cm, so measure your child and compare to the size chart on each product page.
Wool-silk for newborns and sensitive skin
For newborns or babies with very sensitive skin, wool-silk blends (70% merino, 30% silk) are even softer than pure merino and are the most popular choice for next-to-skin wear. For toddlers and older children, pure merino is typically a fine — and more affordable — choice.
Learn more
Guides for base layer buyers
European wool sizing guide
How European sizing works and how to measure your child accurately.
Read the guide →Merino wool weights explained
Interlock, wool-silk, and fleece — which fabric is right for which use case.
Read the guide →How to wash wool clothing
Hand-washing, air drying, and keeping base layers in great condition through multiple kids.
Read the guide →FAQ
Common questions about wool base layers for kids
How many wool base layers should I buy for my baby?
Most parents find 2 to 3 pieces per size is enough. Because wool is naturally odor-resistant and needs washing far less often than cotton — typically every 3 to 5 wears — you don't need as many pieces as with cotton base layers. One to wear, one in the wash, and sometimes a third as backup. For babies who go through multiple outfits a day, you may want more bodysuits specifically, but fewer tops and bottoms are usually sufficient.
What's the difference between merino and wool-silk base layers?
Pure merino wool is soft, breathable, and durable — the standard choice for base layers. Wool-silk blends (typically 70% merino, 30% silk) are even softer and smoother against skin, with added temperature regulation from the silk fiber. Wool-silk is the popular choice for newborns, eczema-prone skin, and the most sensitive wearers. Pure merino is typically fine for toddlers and older children, and is more affordable. Both are from Engel and are IVN BEST certified. More on wool fabric types →
Is wool itchy for baby skin?
Quality merino wool is not itchy for most babies. Merino fibers are typically 17-20 microns in diameter, compared to 30+ microns for the coarse wool that causes the itchy reputation. Engel's IVN BEST certified wool is also processed without the harsh chemical finishes that can irritate skin. For very sensitive babies, wool-silk blends are even gentler and are commonly chosen for newborns and eczema-prone wearers. More on wool and itchiness →
How do I choose the right size?
European children's wool sizing is based on height in centimeters rather than age. Size 56 fits newborns (50-56 cm), 62 fits roughly 1-3 months, 68 fits 3-6 months, 74 fits 6-9 months, and sizes continue in 6 cm increments up through 176. Measure your child's height flat and pick the European size closest to that number. When between sizes, size up — base layers fit close to the body, and a slightly roomy one wears better than a too-small one. See our full sizing guide →
Can my baby wear a wool base layer under pajamas?
Yes — this is one of the most common uses. A thin merino or wool-silk base layer under cotton pajamas adds warmth without bulk, helps regulate temperature through the night, and gives a breathable next-to-skin layer. Many parents use this combination for cooler nights when pajamas alone aren't enough but heavier sleepwear would be too warm.
How often should I wash wool base layers?
Far less often than cotton — typically every 3 to 5 wears. Wool is naturally odor-resistant, so airing the garment out between wears handles most situations. Wash when items are visibly soiled or need freshening. Hand-wash in cool water with a wool-safe (enzyme-free) detergent and lay flat to dry. For bodysuits that may get soiled more quickly, spot-cleaning small stains can extend wear between full washes. See our complete wool care guide →
Can I return base layers if the size is wrong?
Yes. Wool base layers can be returned within our standard return window as long as they are unworn, unwashed, and in original condition with tags attached. For best fit, we recommend measuring your child before ordering and checking the size chart on each product page. See our returns page for full details →