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50,000+ Happy Customers
The Wear-All-Year Knit
A knit that lasts through seasons, play, and growth. Made from ultra-soft, breathable 100% merino wool, these rib-knit leggings have the perfect stretch to stay up, stay on, and never sag. Naturally temperature-regulating, they keep little legs warm in the cold and cool when it’s warm. Sized to grow with them, just roll the cuffs up and let them unfold as they do. Wear alone or as a cozy base layer—these leggings are made for everyday adventure.
SIZE
2y
4y
6y
8y
10y
12y
Estimated ship date May 10 – 31
SIZE
A soft, flexible fit with plenty of stretch and roll-up cuffs, designed to grow with them for lasting comfort.
Please check our Size Guide for more info.
CARE
To keep your item in top condition, hand wash gently in cool water. Avoid soaking, bleaching, or wringing.
For best care, use a wool-safe detergent. Lay flat to dry in the shade—no tumble drying. If needed, use a cool iron. Dry cleaning is not recommended.
RETURNS AND EXCHANGES
USA: We want you to be 100% happy with your purchase. If for any reason you are not satisfied you may return or exchange eligible items within 30 days of ship date. Items must be unused and in original condition, with original tags in place. Please note that items with a discount of 40% or more are not eligible for return. We reserve the right to reject any return that does not meet these requirements.
International: We’re committed to making your shopping experience a great one, no matter where you are! For customers outside the USA, returns will need to be sent back to us at your own expense. Once we receive your return, we’ll gladly process a store credit or refund to your original payment method, based on your preference. If you're exchanging, we'll get in touch with you to arrange payment for the shipping of your new item.
RWS Certified
100% Merino Wool
Recyclable
Sustainable
RWS Certified
100% Merino Wool
Recyclable
Sustainable
BUILT FOR WARMTH
Knitted to feel like a warm, gentle embrace—stretchy, breathable, and made to move with them.
1. Ribbed Knit
Designed to stretch, move, and grow with them.
2. Easy Care & Quick Drying
Low maintenance, dries fast, and ready to wear again.
3. Anti-Odor & Breathable
Keeps your child fresh and comfortable all day.
4. Temperature-Regulating
Adapts to keep them cozy, no matter the weather.
5. RWS & Oeko-Tex Certified
Free from harmful chemicals, safe for their skin.
IT'S NOT JUST WHAT WE SAY, IT'S WHAT WE DO
Here's how we make an impact.
30%
Decrease in CO2 equivalent emissions
100%
Merino wool
100%
Recyclable packaging
Odor Resistant
Thermo Regulating
Super Durable
Ultra Soft
Moisture Wicking
THE LEGGINGS THEY WILL REACH FOR AGAIN AND AGAIN
THE LEGGINGS THEY WILL REACH FOR AGAIN AND AGAIN
EVERYDAY VERSATILITY
One pair, endless wear. The Merino Knit Leggings combine warmth with stretch, making them the perfect layer for any season. Snuggly enough for cool mornings, breathable enough for active afternoons—whether they’re exploring, relaxing, or on the move, these leggings keep up.
QUALITY MADE TO LAST
Fast fashion isn’t made for kids. This is.
Made from 100% merino wool with a durable rib knit, the Merino Knit Leggings are built to move, stretch, and keep their shape. With a flexible fit and naturally resilient fabric, they last season after season—ready to be worn, loved, and passed down.
NUI CERTIFIED MERINO
Merino wool is nature’s ultimate performance fiber—breathable, moisture-wicking, and odor-resistant, all without synthetic treatments. The Merino Knit Leggings move with them through every adventure while staying soft, comfortable, and free from harmful chemicals.
Because good clothes don’t just last—they live on. As part of our (re)Nui pre-loved program, these leggings can be passed down, traded in, and given new life. Less waste, more wear, and a smarter way to shop sustainably—because high-quality knits deserve more than one story.
Good for Your Kids, Gentle on the Earth
Here’s the truth: Most kids' clothes are made from cheap synthetic fabrics that leak microplastics, trap sweat, and wear out fast. The Merino Knit Leggings? It’s natural, breathable, and built to last.
No Chemicals
No Microplastics That Leak Into Skin
Durable
Temperature Regulating
Odor Resistant
Ultra Comfy
Nui
Merino Knit
Synthetic
Fabrics
50,000+ happy customers,
endless days of comfort
Loved by Parents, Approved by Kids
Customer Reviews
I get these for thicker ski thermals, and they double as PJs, which works out great. They're really warm and cozy and cute! The knees do wear out after a while but my boys are hard in stuff! We just patch the knees and keep on wearing them.
Thick and soft! Very happy with these.
These leggings are long which means we were able to use them for a long time, you can easily fold the legs. They seem to be warm, provide enough room on the waist even for a chunky baby, and work great as a single layer on those cooler evenings/mornings.
These are much thicker than other NUI leggings I've purchased before...and I'm glad for it! These are thick yet flexible for movement, so they will be just great for any sort of everyday activity. With the thicker weave, I can see these leggings lasting a lot longer than the thinner NUI leggings we are used to. I hope these remain a staple on the website because I'd definitely purchase them every year!
I have been buying these leggings in multiple colors each year for my now-three-year-old and we love them so much. I haven't found wool leggings anywhere else that I like nearly as much. These are a nice thickness to really keep the child warm and because of this they can be worn with or without additional layers, depending on weather, of course. The ribbing gives a nice stretch and they return well to their shape even without washing. Of course, they are also easy to wash, which is key. The only downside is they usually sell out quickly and don't seem to be available most of the year. We love them with the matching tops.