Whether they’re braving the great outdoors or just seeking extra warmth and comfort at home, the THMO Kids Original Thermal Underwear Long Johns are your child’s go-to solution for a warmer life.
Crafted from high-quality micro-fleece fabric, this thermal bottoms 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, these thermal bottoms keep them dry and fresh throughout the day, making it an ideal choice for active lifestyles, chilly environments and snowball fights.
At the heart of every THMO base layer lies our innovative super-soft thermal microfleece.
These Kids thermal bottoms 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 Bottoms
Micro-Fleece Fabric
Comfort Stretch & Seams
Moisture & Odour Management
Ideal For Winter
Super Soft & Warm
Available In Black & White
5 Kids Size Options
52% Polyester, 48% Cotton
Machine Washable at 30°C

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 |
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Size |
3-4 Years, 5-6 Years, 7-8 Years, 9-11 Years, 12-13 Years |
---|---|
Colour |
Black, White |
Material |
Synthetic |
