Kids' merino · 250 GSM
Kids' Merino Wool Pants 250 Perfect Gray
Size guide
Size Guide
Our merino has a close, next-to-skin fit by design. If you are between sizes, stay true to size for base-layer use or size up for a more relaxed everyday fit. Free returns within 30 days, so ordering two sizes and sending one back is completely fine.
How to measure
Chest — around the fullest part of your chest, with the tape level under the arms.
Waist — around your natural waistline, with the tape comfortably loose.
Hips — around the fullest part of your hips and seat.
Inside leg — from the top of your inner thigh to your ankle bone.
Measure over light clothing, keeping the tape snug but not tight. Tap any chart below to open it full size.
Men's Base Layer Set
Need different sizes for the top and the bottoms? Build your own set →
Women's Base Layer Set
Need different sizes for the top and the bottoms? Build your own set →
Kids' Base Layer Set
Men's T-Shirt
Women's T-Shirt
Men's Long Sleeve
Same body measurements across 165, 190, 250 and 320gsm.
Women's Long Sleeve
Kids' Long Sleeve
Men's Long Johns
Women's Thermal Leggings
Kids' Thermal Leggings
Men's Half Zip
Women's Half Zip
Merino Wool Socks
Beanies, snoods and balaclavas
Still unsure which size to pick? Email info@merinotech.co.uk with your height, chest and waist and we will recommend a size. Free UK delivery over £49 and free returns within 30 days.
- Free shipping over $49.99
- 30-day easy returns
- Ships in 1–2 business days
Description
Kids' Merino Wool Thermal Pants
Comfort meets versatility in our Perfect Gray merino wool thermal pants for kids, made from 100% superfine 19.5-micron merino wool. These 250 GSM midweight base layer bottoms offer exceptional warmth, softness, and breathability — ideal for school days, outdoor play, or cold-weather adventures.
✅ Soft & Itch-Free for All-Day Comfort
These kids' thermal leggings are designed to be gentle on sensitive skin — no itching, bunching, or rubbing like synthetic or cotton alternatives.
✅ Midweight Warmth (250 GSM)
With a 250g/m² construction, these pants provide the right level of insulation for autumn and winter layering while staying breathable and flexible.
✅ Moisture-Wicking & Odour-Resistant
Merino wool naturally wicks away moisture and resists odours, helping your child stay dry, clean, and comfortable even during active play.
✅ Modern & Neutral Perfect Gray
The stylish Perfect Gray colour is clean, neutral, and easy to mix with any top or outerwear — perfect for both boys and girls.
✅ Eco-Friendly Gift Packaging
Each pair is packaged in sustainable, recyclable packaging, making it a thoughtful gift for holidays, birthdays, or back-to-school.
✅ Merino.tech Satisfaction Guarantee
Your happiness matters. Not 100% satisfied? We’ll make it right — no hassle.
Care
Turn inside out. Machine wash cold on a gentle cycle with a wool-safe detergent. Do not bleach. Lay flat or hang to dry.
Shipping & returns
Free UK delivery on orders over £49. Ships in 1–2 business days. 30-day free returns on unworn items with tags.
Kids' merino
Soft merino for kids who never stop moving
Non-itchy merino that keeps kids warm on the slopes, breathable at recess and odour-free after a full day outside. Machine washable and built to survive the season.
Size guide
Kids Pants
Fit
A close, next-to-skin fit made to sit smoothly under trousers, jeans and salopettes. Between sizes? Go by your waist measurement.
How to measure
- Chest – around the fullest part of your chest, tape level under the arms.
- Waist – around your natural waistline, tape comfortably loose.
- Hips – around the fullest part of your hips and seat.
- Inside leg – from the top of your inner thigh to your ankle bone.
Measure over light clothing and keep the tape snug but not tight. Still unsure? Email info@merinotech.co.uk with your height, chest and waist and we will recommend a size. Unworn items can be returned free within 30 days.
THE FABRIC
Why merino wool
Merino wool moves sweat away from your skin as vapour and lets it evaporate from the fabric, so you stay dry and comfortable whether you are hiking, commuting or skiing.
Merino fibres naturally resist the bacteria that cause odour, so you can wear a base layer for several days, on the trail or while travelling, and it still smells fresh.
Wool can absorb up to 30% of its weight in moisture without feeling wet. In damp British weather it keeps insulating where cotton and polyester leave you cold.
Merino absorbs UV radiation: our lightweight layers offer UPF 25 and the midweight and heavyweight options UPF 50+, handy on long days in the hills.
Merino wool is naturally hard to ignite and self-extinguishes without melting onto the skin, unlike synthetic base layers.
Merino is a natural, renewable and biodegradable fibre. Sheep grow a new fleece every year, and a worn-out merino garment breaks down instead of shedding plastic microfibres.
FAQ
Kids' merino base layers: FAQ
What is this 250gsm thermal leggings best for?
It is a midweight 250gsm merino layer, best for school ski trips, winter sports and cold days. Compare every weight in our merino weight guide.
Is this thermal leggings warm enough for skiing?
Yes. 250gsm midweight merino under a ski jacket and trousers is the most popular choice for a ski holiday. Choose 320gsm if you feel the cold.
Is merino wool itchy for children?
No. We use superfine merino that is soft against the skin, so children who refuse scratchy wool jumpers are usually happy to wear it all day.
What should my child wear on a school ski trip?
A merino thermal top and bottoms under their ski jacket and salopettes, plus merino socks and a beanie. A 250gsm set keeps them warm on the slopes without overheating in the chalet.
How do I choose the right kids' size?
Sizes are based on age and height. Base layers should fit close to the body, so choose the size that matches your child now rather than buying several sizes up. See the size guide.
Can kids' merino go in the washing machine?
Yes. Wash inside out at 30°C on a wool or delicate cycle and dry flat. Keep it out of the tumble dryer to prevent shrinking.
Is merino good for kids who get hot and cold quickly?
Yes. Merino regulates temperature and wicks sweat, so it keeps active children comfortable when they run around and warm when they stop.