Whether they’re braving the great outdoors or just seeking extra warmth and comfort at home, the THMO Kids Original Thermal Underwear Top is your child’s go-to solution for a warmer life.
Crafted from high-quality micro-fleece fabric, this thermal top boasts exceptional stretch properties and comfort seams, ensuring unrestricted movement and a snug, non-chafing fit that's perfect for layering beneath your clothing. So they can say goodbye to discomfort and hello to warmth!
Featuring advanced moisture and odour management technology, this thermal top keeps them dry and fresh throughout the day, making it an ideal choice for active lifestyles, chilly environments and snowball fights..
But the true secret to our warmth lies within our expert brushing process, which creates a luxurious fur-like pile that traps more warm air close to your skin, maximising thermal performance and comfort for prolonged warmth.
These Kids thermal tops are available in Black or White and are made from 52% Polyester & 48% Cotton. They come in 5 Kids sizes: 3-4 Years, 5-6 Years, 7-8 Years, 9-11 Years, 12-13 Years and are Machine Washable at 30°C.
Extra Product Details
THMO Kids Thermal Underwear Top
Micro-Fleece Fabric
Comfort Stretch & Seams
Moisture & Odour Management
Ideal For Winter
Super Soft & Warm
Available In Black & White
5 Kids Size Options

Adults Sizing
UK | DE | FR | US |
---|---|---|---|
3-5 | 36-38 | 36-38 | 4-6 |
3-5.5 | 36-38 | 36-38 | 4-6 |
4-5 | 37-38 | 37-38 | 5-6 |
4-6 | 37-39 | 37-39 | 5-7 |
4-7 | 37-40 | 37-40 | 5-8 |
4-8 | 37-42 | 37-42 | 5-9 |
6-8 | 39-42 | 39-42 | 7-9 |
6-8.5 | 39-42 | 39-42 | 7-9.5 |
6-9 | 39-43 | 39-43 | 7-10 |
6-11 | 39-45 | 39-45 | 7-12 |
7-10 | 40-44 | 40-44 | 8-11 |
7-11 | 40-45 | 40-45 | 8-12 |
8-10 | 42-44 | 42-44 | 9-11 |
8-11 | 42-45 | 42-45 | 9-12 |
9-11 | 43-45 | 43-45 | 10-12 |
9-12 | 43-46 | 43-46 | 10-13 |
10-13 | 44-46 | 44-46 | 11-14 |
11-13 | 45-49 | 45-49 | 12-14 |
11-14 | 45-50 | 45-50 | 12-15 |
12-14 | 46-50 | 46-50 | 13-15 |
Children's Sizing
UK | DE | FR | US |
---|---|---|---|
3-5.5 | 19-22 | 19-22 | 4-6.5 |
6-8 | 23-26 | 23-26 | 7-9 |
9-12 | 27-30 | 27-30 | 10-1 |
9-1 | 27-33 | 27-33 | 10-2 |
12-3 | 30-36 | 30-36 | 13-4 |
2-5 | 34-39 | 34-39 | 3-5 |
Buy Now, Pay Later

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Available online and in store at your favorite retailers. Clearpay makes shopping flexible, convenient and stress free. Ready to shop smarter? Let’s go.
Size |
9-11 Years, 12-13 Years, 3-4 Years, 5-6 Years, 7-8 Years |
---|---|
Colour |
White, Black |
Material |
Synthetic |
