Men's Underwear & Underlayers

For any outdoor activity, what you wear next to the skin can make all the difference to your comfort. At Decathlon you’ll find a range of breathable and insulating men’s underwear, underlayers and base layers to layer up correctly.
155 items
TOG24 Mens Bergenz Ski Socks (Pack of 3) (Black/Chilli Red/Dark Grey)

TOG24 Mens Bergenz Ski Socks (Pack of 3) (Black/Chilli Red/Dark Grey)

2 colours
Sold and shipped by Pertemba GB
£34.00
Sale
WEDZE Men’s 1/2 Zip Ski Thermal Base Layer Top - BL 500 - Red

WEDZE Men’s 1/2 Zip Ski Thermal Base Layer Top - BL 500 - Red

(1196)
3 colours
£12.99
£17.9927% off
Sale
HEAT HOLDERS Mens Thermal Extra Long 2.3 TOG Winter Knee High Ski Socks

HEAT HOLDERS Mens Thermal Extra Long 2.3 TOG Winter Knee High Ski Socks

8 colours
Sold and shipped by Sock Snob UK
£13.53
£14.999% off
Sale
HEAT HOLDERS Mens Thermal Extra Long 2.3 TOG Winter Knee High Ski Socks

HEAT HOLDERS Mens Thermal Extra Long 2.3 TOG Winter Knee High Ski Socks

8 colours
Sold and shipped by Sock Snob UK
£13.53
£14.999% off
VAN RYSEL Long-Sleeved Cycling Base Layer Racer 2 - Burgundy

VAN RYSEL Long-Sleeved Cycling Base Layer Racer 2 - Burgundy

(143)
3 colours
£29.99
Sale
KIPSTA Adult Football Socks Essential Club - Red

KIPSTA Adult Football Socks Essential Club - Red

(1410)
4 colours
£2.99
£3.9925% off
2 for £30
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - Red

KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - Red

(746)
13 colours
£17.99
New lower price
KIPSTA Football Socks Viralto Club - Orange

KIPSTA Football Socks Viralto Club - Orange

(3207)
10 colours
£5.99
Was £6.99
Best value
KIPSTA Short Grip Football Socks Viralto MiD - Red

KIPSTA Short Grip Football Socks Viralto MiD - Red

(1165)
5 colours
£7.99
UMBRO Mens Leg Sleeves (New Claret)

UMBRO Mens Leg Sleeves (New Claret)

14 colours
Sold and shipped by Pertemba GB
£11.99
TCA Men's HyperFusion Breathable Base Layer Compression Top - Mock - High Risk Red

TCA Men's HyperFusion Breathable Base Layer Compression Top - Mock - High Risk Red

(1)
7 colours
Sold and shipped by Thorogood Sports Ltd
£16.99
Last chance
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - Cardinal Pink

KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - Cardinal Pink

(746)
13 colours
£17.99
Best value
OFFLOAD Adult Knee-Length Rugby Socks R500 - Red

OFFLOAD Adult Knee-Length Rugby Socks R500 - Red

(145)
2 colours
£5.99
VAN RYSEL Road Cycling Base Layer Training - Burgundy

VAN RYSEL Road Cycling Base Layer Training - Burgundy

(2902)
5 colours
£17.99
New lower price
OUTSHOCK Men's MMA and Grappling Rashguard - Smoky Black/Royal Red

OUTSHOCK Men's MMA and Grappling Rashguard - Smoky Black/Royal Red

(30)
£24.99
Was £27.99
UMBRO Mens Classico Socks (New Claret)

UMBRO Mens Classico Socks (New Claret)

16 colours
Sold and shipped by Pertemba GB
£12.99
New lower price
KIPSTA Football Socks Viralto Club - Red

KIPSTA Football Socks Viralto Club - Red

(3207)
10 colours
£5.99
Was £6.99
HEAT HOLDERS Mens Thick Winter Warm Original 2.3 TOG Thermal Socks

HEAT HOLDERS Mens Thick Winter Warm Original 2.3 TOG Thermal Socks

7 colours
Sold and shipped by Sock Snob UK
From £9.99
GIORDANA Giordana FR-C Socks - Tall Cuff - Sangria

GIORDANA Giordana FR-C Socks - Tall Cuff - Sangria

13 colours
Sold and shipped by Giordana UK
£15.99
GIORDANA Giordana FR-C Socks - Tall Cuff - Pomegranate Red

GIORDANA Giordana FR-C Socks - Tall Cuff - Pomegranate Red

13 colours
Sold and shipped by Giordana UK
£15.99
TCA Men's HyperFusion Breathable Base Layer Compression Top - High Risk Red

TCA Men's HyperFusion Breathable Base Layer Compression Top - High Risk Red

(1)
7 colours
Sold and shipped by Thorogood Sports Ltd
£17.99
TCA Men's Power Base Layer Compression Long Sleeve Top - Cabernet

TCA Men's Power Base Layer Compression Long Sleeve Top - Cabernet

(4)
14 colours
Sold and shipped by Thorogood Sports Ltd
£17.99
TCA Men's Power Base Layer Compression Long Sleeve Top - High Risk Red

TCA Men's Power Base Layer Compression Long Sleeve Top - High Risk Red

(4)
14 colours
Sold and shipped by Thorogood Sports Ltd
£17.99
UMBRO Mens Leg Sleeves (Vermillion)

UMBRO Mens Leg Sleeves (Vermillion)

14 colours
Sold and shipped by Pertemba GB
£11.99
TCA Men's HyperFusion Breathable Base Layer Compression T-shirt - High Risk Red

TCA Men's HyperFusion Breathable Base Layer Compression T-shirt - High Risk Red

(2)
7 colours
Sold and shipped by Thorogood Sports Ltd
£16.99
Sale
THMO 1 Pair Mens Thick Fleece Lined Warm Thermal Socks for Winter

THMO 1 Pair Mens Thick Fleece Lined Warm Thermal Socks for Winter

7 colours
Sold and shipped by Sock Snob UK
£8.04
£8.9910% off
TCA Men's Performance Base Layer Compression Top - Mock - High Risk Red

TCA Men's Performance Base Layer Compression Top - Mock - High Risk Red

(4)
11 colours
Sold and shipped by Thorogood Sports Ltd
£17.99
TCA Men's Pro Performance Baselayer Long Sleeve Mock Neck Top

TCA Men's Pro Performance Baselayer Long Sleeve Mock Neck Top

(4)
11 colours
Sold and shipped by Thorogood Sports Ltd
£17.99
CODE BUNDLE15
QUECHUA Warm Hiking Socks - SH900 MOUNTAIN MID - 2 Pairs

QUECHUA Warm Hiking Socks - SH900 MOUNTAIN MID - 2 Pairs

(180)
£24.99
£12.50/unit
QUECHUA Hiking Socks Hike 500 Mid x2 Pairs - Grey and Red

QUECHUA Hiking Socks Hike 500 Mid x2 Pairs - Grey and Red

(3425)
3 colours
£12.99
£6.50/unit
Sale
JEEP Mens Wool Knit Ribbed Design Padded Boot Socks

JEEP Mens Wool Knit Ribbed Design Padded Boot Socks

3 colours
Sold and shipped by Sock Snob UK
£9.17
£11.9923% off
TCA Boys' Performance Base Layer Compression Top - High Risk Red

TCA Boys' Performance Base Layer Compression Top - High Risk Red

(5)
13 colours
Sold and shipped by Thorogood Sports Ltd
£15.99
TCA Boys' Pro Performance Baselayer Long Sleeve Top

TCA Boys' Pro Performance Baselayer Long Sleeve Top

(5)
13 colours
Sold and shipped by Thorogood Sports Ltd
£15.99
TCA Men's Performance Base Layer Compression T-shirt - Team Red

TCA Men's Performance Base Layer Compression T-shirt - Team Red

(6)
6 colours
Sold and shipped by Thorogood Sports Ltd
£19.99
TCA Men's Pro Performance Baselayer Short Sleeve Top

TCA Men's Pro Performance Baselayer Short Sleeve Top

(6)
6 colours
Sold and shipped by Thorogood Sports Ltd
£18.99
BRIDGEDALE TRAIL RUN Ultralight T2 Merino Sport Low Men's - Red

BRIDGEDALE TRAIL RUN Ultralight T2 Merino Sport Low Men's - Red

4 colours
Sold and shipped by Bowls4u T/A 4U Trading Group
From £16.90
Sale
DOMYOS Men's Majority Cotton Boxers Twin-Pack - Grey/Red

DOMYOS Men's Majority Cotton Boxers Twin-Pack - Grey/Red

(30)
£9.99
£14.9933% off
£5.00/unit
TCA Men's Performance Base Layer Compression Shorts - Cabernet

TCA Men's Performance Base Layer Compression Shorts - Cabernet

(6)
8 colours
Sold and shipped by Thorogood Sports Ltd
£16.99
GILBERT Pro Match Socks, Red

GILBERT Pro Match Socks, Red

8 colours
Sold and shipped by Bowls4u T/A 4U Trading Group
£14.97
GILBERT Pro Match Socks, Maroon

GILBERT Pro Match Socks, Maroon

8 colours
Sold and shipped by Bowls4u T/A 4U Trading Group
£14.97
4.4/5 based on 20191 reviews collected online and in stores

Underwear you can wear to run, jump and play

Welcome to Decathlon's men's innerwear and thermals page. No matter if you do sport every day or occasionally we have the right clothes and equipment to meet your needs. Our men's innerwear and thermals are designed for different sports and intensity. Discover the range for cycling, running, skiing, football and other sports now.