Reiff · Merino Wool Cardigan
Baby Thermal Cardigan, 100% Organic Merino Wool
Fine-knit German thermal layer for babies 3–48 months. GOTS certified merino wool with temperature-regulating properties and natural softness for sensitive skin.
Reiff is a German family-owned manufacturer with roots dating to 1939, when Adoll Reiff founded Stoff Strick in Gönnigen. For over 80 years, Reiff has specialized in flat-knit processing — meaning they not only produce their own fabrics but process and finish them in-house. Reiff is one of the few remaining European manufacturers fully committed to organic textiles and ecological production. Their commitment to quality and environmental responsibility runs deep: since 2002, under the third generation of ownership (Axel and Andrea Reiff), the company has produced exclusively organic wool and cotton apparel, with nearly all production remaining on-site in Germany. Reiff is a long-standing member of the International Association of Natural Textile Industry (IVN) and adheres to both GOTS and IVN standards.
When to Wear It
This thermal cardigan is designed as a mid-weight layering piece for cool to cold weather. Reiff positions it for fall, winter, and early spring wear, typically for temperatures between 10–18°C (50–64°F). Worn over a lightweight base layer (such as a merino undershirt or thermal top), this cardigan provides sustainable warmth without bulk. It's ideal for babies during transitional seasons, cool indoor environments, or as an extra layer for outdoor play in colder months. The fine merino wool naturally regulates body temperature, meaning your baby stays warm without overheating—a key advantage over synthetic fleece.
The cardigan is sized by age and height, following European convention. Reiff sizing runs true to European standards, which means slightly more tapered than many US brands—see the sizing section below for detailed guidance on upsizing if your child is at the upper end of an age range.
Materials & Construction
Fiber
100% organic merino wool, fine-knit. Merino is prized for babies because the fiber diameter (micron count) is typically 17–19 microns—fine enough to feel soft next to skin without the scratchiness of coarser wools. This fineness makes a meaningful difference for sensitive skin.
Certifications
GOTS certified (Global Organic Textile Standard), the leading worldwide standard for organic textiles. GOTS covers both the organic farming of the fiber and the entire processing chain—dyes, finishes, and sewing threads. Reiff's merino also carries kbT (kontrolliert biologische Tierhaltung), meaning certified organic livestock farming with strict animal welfare standards.
Wool Origin & Processing
Reiff sources mulesing-free Patagonian merino from South America, processed and knitted in Germany. Production remains almost entirely within a 50 km radius of Reiff's Gönnigen facility, minimizing transport impact. Synthetic dyes are GOTS-certified, and all steps up to the finished product meet IVN standards.
Buttons & Details
Tagua nut buttons (also called "vegetable ivory") provide a durable, natural alternative to synthetic or bone buttons. Tagua is harvested from a palm native to South America and is fully compostable. Button holes are finished with eco-conscious thread. Each detail reflects Reiff's commitment to low-impact design.
Why merino matters for babies
Fine merino wool (17–19 microns) is soft and breathable, unlike coarser wool. It naturally resists odor and bacteria, meaning it requires less frequent washing than cotton—a significant advantage for growing babies. Merino also naturally temperature-regulates: it absorbs moisture vapor from skin and releases it, keeping your baby warm without overheating.
What This Cardigan Does
Temperature Regulating
Merino wool naturally balances temperature by absorbing and releasing moisture vapor. Your baby stays warm in cold weather without the risk of overheating indoors—a genuine advantage over synthetic insulation.
Breathable & Soft
Fine merino at 17–19 microns feels silky against skin. The knit allows air circulation, making this suitable as a standalone layer or worn over a lightweight base. No scratchiness or irritation for most babies and sensitive-skin children.
Odor Resistant
Merino wool naturally resists bacterial growth and odor. This cardigan can be worn for multiple days between washes, making care easier and extending the life of the fiber. Simply air between wears.
Built to Last
Reiff's flat-knit construction and Patagonian merino create a durable piece that passes between children. Proper care (see below) means this cardigan improves with time, softening with each gentle wash.
Sizing by Age & Height
European sizing runs slightly more tapered than North American sizes. Use the chart below to find your child's best size. If your child is at the upper end of an age range or tall for their age, size up. This cardigan is meant to layer comfortably, so a slightly roomy fit is appropriate.
| Age |
EU Size |
Height (cm) |
Height (in) |
Fit Note |
| 3–6 months |
62/68 |
62–68 |
24–27 |
Newborns and small babies |
| 6–12 months |
74/80 |
74–80 |
29–31 |
Standard for crawling babies |
| 1–2 years |
86/92 |
86–92 |
34–36 |
Most common toddler range |
| 3–4 years |
98/104 |
98–104 |
38–41 |
Preschool to pre-K |
About European sizing: The EU sizes (62, 74, 86, etc.) refer to the garment's length in centimeters. European brands typically run slimmer in the chest and shoulders than equivalent US sizes. Reiff cardigans are designed to layer, so they're cut with room for a base layer underneath. If your child tends to be on the heavier or stockier side, don't hesitate to size up.
Honest Assessment
Best For
This cardigan works exceptionally well for: babies and toddlers (3 months–4 years) in cool to cold climates; children with sensitive skin, eczema, or a history of reacting to synthetics; parents who value durable, multi-child pieces that last; and families committed to natural fibers and organic certifications. It's also ideal for gift-giving—the colors are gender-neutral, the quality is heirloom-grade, and the price reflects honest craftsmanship.
Trade-Offs
Merino wool requires cold-water washing and gentle handling—it will felt and shrink if exposed to hot water or agitation. This is not a grab-and-throw-in-the-dryer piece. A small percentage of people (roughly 1–2%) are still sensitive to wool even at fine micron counts; if your child has reacted to wool before, consider a wool/silk blend as a gentler first option. The price reflects German manufacturing and organic certification, so this is an investment piece, not a budget option. Finally, this cardigan is designed as a layering piece—it's not a standalone jacket for heavy rain or snow. Fit runs European/slim, so check sizing carefully.
Investment Case
At $76.99, this cardigan costs significantly more than mass-market alternatives. You're paying for: German manufacturing and Reiff's in-house quality control; certified organic merino with traceability from farm to finished product; flat-knit construction that stands up to years of wear; and the reality that this piece will likely pass between children, grandchildren, or resale. A wool sweater properly cared for improves with age—becoming softer and better with each gentle wash. That's the genuine difference between heirloom-quality apparel and fast fashion.
Care Instructions
Cold water wash Wool cycle or hand wash Lay flat to dry Do not tumble dry
Hand wash or use your machine's wool/delicate cycle with cold water (below 30°C / 86°F) only. Use a gentle wool-specific detergent such as Eucalan, Sonett, or Ecos. Avoid fabric softener and bleach—they break down wool fibers and reduce breathability over time. For washing, fill the basin or machine with cool water, gently submerge the cardigan, and let it soak for 5–10 minutes before very gently agitating. Do not wring or twist. Press out excess water gently by hand or in a towel. Lay flat on a clean, dry surface to air dry, reshaping to original dimensions while damp. Wool naturally resists odor and rarely needs frequent washing—airing between wears is often sufficient. Spot-clean visible stains with a damp cloth and let air dry. With proper care, this cardigan will retain its softness and shape for years and easily pass between children.
Frequently Asked Questions
Is merino wool itchy for babies with sensitive skin?
Fine merino at 17–19 microns is significantly softer than coarser wools and is gentle for most babies. However, a small percentage of people remain sensitive to wool even at fine micron counts. If your child has reacted to wool in the past, we recommend starting with a wool/silk blend, which is the gentlest natural fiber option. If you're testing merino for the first time, consider wearing it over a thin base layer as a protective step.
How warm is this cardigan? What temperature range is it for?
This is a mid-weight thermal layer, ideal for temperatures between 10–18°C (50–64°F). Worn over a base layer, it provides sustained warmth for cool to cold weather without bulk. Merino naturally temperature-regulates, so your baby stays warm without overheating. In very cold weather (below 5°C / 41°F), you may want to layer it under a water-resistant outer jacket.
Can I machine wash this, or does it have to be hand washed?
Machine washing is fine on a wool/delicate cycle with cold water, but hand washing is gentler and extends the life of the piece. The critical requirements are cold water (below 30°C / 86°F), a gentle wool detergent, and lay-flat drying—never hot water, agitation, or tumble drying. Hot water and agitation will cause merino to felt and shrink. If you use a machine, set it to the gentlest, coldest, and shortest cycle available.
How often do I need to wash it?
Merino naturally resists odor and bacteria. Most families find they can wear a merino cardigan for 3–5 days before washing, simply by airing it between wears. This is significantly less frequent than cotton or synthetic layers, which reduces care burden and extends the life of the garment. Spot-clean visible stains and wash the whole piece only when necessary.
What does "laid flat to dry" mean, and why can't I hang or tumble dry?
Wet merino stretches easily, so hanging it risks permanent stretching at the shoulders and cuffs. Tumble drying with heat causes felting (the fibers compress and bond together), shrinking the piece. "Lay flat" means place the damp cardigan on a clean, dry surface (a table, towel, or drying rack) and reshape it to its original dimensions while damp. It will air dry in 24–48 hours depending on humidity. This simple step preserves the fit and longevity of your cardigan.
Why is this more expensive than other baby cardigans?
You're paying for German manufacturing, certified organic merino, and Reiff's commitment to in-house production and quality control. Reiff does not offshore production—nearly everything is made within 50 km of their Gönnigen facility. The fiber is traced from certified organic farms, and all processing meets GOTS and IVN standards. This cardigan is built to last through multiple children and decades of gentle care. The price reflects that durability and the reality that fast-fashion economics and heirloom quality are incompatible.
Will this shrink if I accidentally wash it in warm water?
Yes. Merino wool will felt and shrink if exposed to hot water and agitation. If an accident happens, stop the cycle immediately, rinse gently in cold water, and lay flat to dry. Minor shrinkage may reverse with careful re-blocking (reshaping while damp). To prevent shrinkage entirely, always use cold water (below 30°C / 86°F), gentle detergent, and the lowest agitation setting. This is the one non-negotiable care requirement.
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