Reiff · Kids Merino Wool Leggings
Merino Wool Thermal Leggings for Kids
100% organic merino wool base layer—fine-knit, temperature-regulating, naturally breathable. German-made thermal bottoms for active children in cool and cold weather.
About the Maker
Reiff, established in Germany, specializes in merino wool and wool-blend apparel designed for active children and families. Known for precise weight classifications and temperature-specific sleep sack designs, Reiff combines heritage European knitwear craftsmanship with modern understanding of natural fiber performance. These leggings reflect that same attention to fiber quality and functional layering.
When to Wear Them
These are fine-knit merino wool leggings designed as a standalone base layer or second layer under pants for temperatures between 10–18°C (50–64°F). They excel in transitional seasons (fall and spring) and as the base layer in winter when worn under heavier pants or snowsuits. Unlike thick thermal underwear, the fine knit creates warmth without bulk—ideal for active children who move between outdoor play and indoor spaces.
Best for: Cool-weather play, layering under winter pants, extended outdoor time in mild cold, a alternative to synthetic thermals, and children new to wool who want a soft starting point.
Materials & Construction
Fiber Composition
100% organic merino wool. Fine-knit structure typical of a mid-weight base layer, approximately 17–19 microns—soft enough for direct skin contact for most children.
Certifications
GOTS certified organic (Global Organic Textile Standard). kbT certification confirms the wool comes from certified organic livestock farming with strict animal welfare standards.
Country of Manufacture
Germany. Reiff knitwear is manufactured in Germany using imported merino wool fiber (primarily from Australia and New Zealand).
Weight & Feel
Light to mid-weight knit. These sit between a delicate silk/wool blend and a heavy winter fleece. Soft hand feel when held, firm enough to hold their shape wash after wash.
Why Merino Wool?
Temperature Regulation
Merino wool fibers absorb moisture vapor and release heat, maintaining a stable microclimate against skin. Unlike synthetic bases, there's no clammy feeling even during active play.
Breathability
Fine merino breathes exceptionally well—your child won't overheat during transitions between outdoors and indoors. The knit structure allows air circulation while trapping body heat.
Odor Resistance
Merino naturally inhibits bacterial growth, reducing odor development. These can be worn multiple times between washes—simply air them out between wears.
Durability
Quality merino softens with each wash rather than pilling or degrading. These leggings are designed to last through multiple children when cared for properly.
About Wool Softness & Sensitive Skin
Fine merino at 17–19 microns is meaningfully softer than coarse wool and comfortable for most babies and children, including those with sensitive skin. However, a small percentage of people react to any wool fiber. If your child has reacted to wool before, start with a Reiff merino/silk blend (30% silk content) instead—the gentlest entry point to wool layering. Some children also benefit from wearing merino over a thin base layer for the first few wears as fibers fully soften.
Sizing
| Size |
Age Range |
Height (cm) |
Height (in) |
Fit Note |
| 74/80 |
6–12 months |
74–80 |
29–31 |
Full-length leggings |
| 86/92 |
1–2 years |
86–92 |
34–36 |
Full-length leggings |
| 98/104 |
3–4 years |
98–104 |
38–41 |
Full-length leggings |
| 110/116 |
5–6 years |
110–116 |
43–45 |
Full-length leggings |
| 122/128 |
7–8 years |
122–128 |
48–50 |
Full-length leggings |
European Sizing Note: European children's sizing runs slightly slimmer than US equivalents. If your child is at the upper end of an age range or tall for their age, sizing up is recommended. Reiff leggings have modest elastication at the waist to accommodate growth and movement.
[Verify] Confirm exact size chart from current Reiff specification sheet and current EcoAble stock availability before publication.
Honest Assessment
Best For
Children who need a natural-fiber base layer for cool-weather play, active kids who move between outdoor and indoor spaces, families avoiding synthetic materials, and children new to wool who want a soft, mid-weight introduction to merino. Also an excellent choice for kids with eczema or sensitive skin, provided there's no prior wool sensitivity.
Trade-Offs
Cost: Reiff merino leggings are a heritage European product at heritage pricing—substantially more than synthetic bases or mass-market options. Wool care: These require hand or delicate-cycle machine washing in cold water with wool wash, and must lay flat to dry (no tumble drying). A small percentage of children react to wool fiber, though fine merino sensitivity is rare. Not suitable for very cold climates (below 0°C / 32°F) without heavy layering on top.
Investment Case
These leggings are built to last through multiple children when properly cared for. Merino softens with each wash, often improving feel and comfort over time. The fine knit resists pilling and holds its shape. For families managing eczema, avoiding synthetic bases, or committed to natural fiber clothing, the per-wear cost drops significantly when a single pair lasts through seasons and hand-downs.
Care Instructions
Hand wash or wool cycle Cold water Wool-specific detergent Lay flat to dry No tumble drying
Washing: Hand wash in cold water with a wool-specific detergent (such as Eucalan or Sonett wool wash), or use the wool or delicate cycle on your machine with cold water only. Avoid hot water—it can felt wool fibers. Press water out gently; never wring or twist.
Drying: Lay flat to reshape and air dry. Do not use a tumble dryer or hang to dry, which can stretch the knit. Wool naturally resists odor and rarely needs frequent washing—airing between wears often suffices.
Storage: Store in a breathable container or drawer. Wool attracts moths; consider pairing with cedar or lavender sachets.
Why this matters: Wool washed in hot water or tumble-dried will felt and shrink significantly. The care routine is simple once learned, and these leggings will stay soft and functional for years.
Questions
Are these leggings itchy?
No. Fine merino at 17–19 microns is soft against skin for most children and adults. Unlike coarse wool, fine merino doesn't have the itchy, scratchy feeling. That said, a small percentage of people are sensitive to any wool fiber. If your child has reacted to wool in the past, consider starting with a Reiff merino/silk blend instead, which is gentler on reactive skin. Some children also benefit from wearing the leggings over a thin cotton base layer for the first few wears as the fibers fully soften.
How often do I need to wash these?
Merino wool resists odor and bacteria development naturally. Most wearers find they can be worn 3–5 times between washes if aired out between wears. Simply hang them in a well-ventilated space overnight, and the fabric will refresh. This low-wash cycle reduces wear on the fibers and extends the life of the leggings significantly.
Can I machine wash these?
Yes, on a wool or delicate cycle with cold water and wool-specific detergent. The key is cold water—never warm or hot. Hand washing in a basin is also an option and is actually easier for most people. Either way, lay flat to dry; never tumble dry.
What's the difference between merino and regular wool?
Merino is a specific breed of sheep producing finer, softer fiber than coarser wool breeds. Merino's fiber diameter (micron count) is typically 17–24 microns, making it comfortable enough for next-to-skin wear. It's naturally temperature-regulating, moisture-absorbing, and odor-resistant in ways coarser wool isn't. All of Reiff's children's apparel uses premium merino specifically because of these properties.
What does GOTS certification mean?
GOTS (Global Organic Textile Standard) is the leading worldwide standard for organic textiles. It covers both the organic farming of fiber crops and the entire processing chain—including spinning, dyeing, finishing, and manufacturing. GOTS certification ensures no synthetic pesticides, harmful chemicals, or heavy-metal dyes are used. It's the highest standard for organic textile integrity.
What's kbT certification?
kbT (kontrolliert biologische Tierhaltung, or "controlled organic livestock farming") certifies that wool comes from animals raised on certified organic farms with strict animal welfare standards. The animals are not treated with synthetic pesticides, antibiotics, or routine growth hormones. It's a fiber-origin certification that pairs with GOTS textile certification to ensure both the fiber and the finished product meet organic standards.
Will these shrink if I wash them wrong?
Yes. Wool washed in hot water or agitated heavily (or tumble-dried) will felt and shrink. However, the care routine is straightforward once learned: cold water, gentle detergent, flat to dry. Following these simple steps ensures the leggings stay the correct size and remain soft for years of wear.
Are these suitable for active play?
Absolutely. Merino wool's temperature regulation and breathability make it ideal for active children. Your child won't overheat during movement, and the moisture absorption means they stay dry even during vigorous play. These are designed for functional layering during outdoor activities.
