Whether you're braving the great outdoors or just seeking extra warmth and comfort at home, the THMO Men's Original Thermal Underwear Bottoms is your go-to solution for a warmer life.
Crafted from high-quality micro-fleece fabric, these thermal bottoms boast exceptional stretch properties and comfort seams, ensuring unrestricted movement and a snug, non-chafing fit that's perfect for layering beneath your clothing. Say goodbye to discomfort and hello to warmth!
Featuring advanced moisture and odour management technology, these thermal bottoms keep you dry and fresh throughout the day, making it an ideal choice for active lifestyles and chilly environments.
At the heart of every THMO base layer lies our innovative super-soft thermal microfleece.
These thermal bottoms are available in Black or White and are made from 52% Polyester & 48% Cotton. They come in 4 Men’s sizes: Medium, Large, X-Large & XX-Large and are Machine Washable at 30°C.
Extra Product Details
THMO Thermal Underwear Bottoms
Micro-Fleece Fabric
Comfort Stretch & Seams
Moisture & Odour Management
Ideal For Winter
Super Soft & Warm
Available In Black & White
52% Polyester, 48% Cotton
Machine Washable at 30°C
Buy Now, Pay Later

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Size |
M, L, XL, XXL |
---|---|
Colour |
Black, White |
Material |
Synthetic |

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 |
UK Postage
£2.49 - Evri Standard Tracked - 2-3 Days Delivery
£3.49 - Evri Next Day Tracked - Express 24hr Next Day (orders placed before 2pm on a working day, UK only; subject to courier availability and exclusions).
* Spend over £35 For Free Express 24hr Next Day Delivery.
* Please note that some smaller items may be sent using an untracked Large Letter Service.
EU Postage
€4.99 - Evri International - Tracked (3-5 Days)
* Spend over €40 For Free Evri International Post 3-5 Delivery
Switzerland Postage
6CHF - Asendia (Swiss Post) - Tracked (3-5 Days)
International Postage
$4.99 DHL Express - Tracked (3-5 Days)
*Spend over $50.00 Free DPD (3-5 Days)
Other Postage Information
Please see below the cut-off time for our Same Day Despatch service.
2 pm - for UK orders
1 pm – for EU orders
11 am – USA orders
Buying during the weekend? Your order will be processed on the next working day (Monday). Certain International orders may be subject to additional customs duties or taxes, which are the responsibility of the recipient.
Customs & Duty
The customer is responsible for the importation of products into their country and must obey the regulations set by that country. Parcels may be subject to import duties and tax; Sock Snob has no control over these charges and cannot predict the amounts charged.
It is our understanding that personal purchases under a certain amount will not incur any customs charges. Please see the full information and amounts below.
Some international orders may be subject to additional customs duties or taxes, which are the responsibility of the recipient.
USA: Orders under $800 should not incur any charges.
EU: For orders under the equivalent of €150, IOSS tax will be paid by Sock Snob UK LTD
If your purchase is over the equivalent of €150, the customer will be responsible for paying the IOSS sales tax on your purchase.
All EU purchases are subject to IOSS tax. IOSS tax is an EU form of VAT formulated in January 2021 to facilitate the collection of sales tax within the EU.
If you have been incorrectly charged with any customs or IOSS charges, please get in contact with us and we will investigate your query.
Please make sure you have proof of the charges when you contact us. This could be in the form of a receipt from your local courier, or an email notification.
