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.
939 items
1000 MILE Mens Liner Socks (Black)
1000 MILE Mens Liner Socks (White)
Gallery item 1 out of 2
1000 MILE Mens Liner Socks (Black)
2 colors
Sold and shipped by Pertemba GB
£12.49
PUMA Mens Quarter Socks (Pack of 3) (White)
PUMA Mens Quarter Socks (Pack of 3) (White)
Sold and shipped by Pertemba GB
£11.49
CRAGHOPPERS Men's Heat Regulating Travel Sock
CRAGHOPPERS Men's Heat Regulating Travel Sock
Gallery item 1 out of 2
CRAGHOPPERS Men's Heat Regulating Travel Sock
2 colors
Sold and shipped by Official Craghoppers UK Ltd.
£11.95£18.00
DUNLOP Mens Osterley Trainer Socks (Pack of 3) (White)
DUNLOP Mens Osterley Trainer Socks (Pack of 3) (White)
Sold and shipped by Pertemba GB
£11.49
PUMA Unisex Adult Heritage Stripe Crew Socks (Pack of 2) (White/Black)
PUMA Unisex Adult Heritage Stripe Crew Socks (Pack of 2) (Black/White)
Gallery item 1 out of 2
PUMA Unisex Adult Heritage Stripe Crew Socks (Pack of 2) (White/Black)
2 colors
Sold and shipped by Pertemba GB
£10.49
DARE 2B Unisex Adult Essentials Ankle Socks (Pack of 2) (Black)
DARE 2B Unisex Adult Essentials Ankle Socks (Pack of 2) (White)
DARE 2B Unisex Adult Essentials Ankle Socks (Pack of 2) (Ebony Grey)
Gallery item 1 out of 3
DARE 2B Unisex Adult Essentials Ankle Socks (Pack of 2) (Black)
3 colors
Sold and shipped by Pertemba GB
£9.99
UMBRO Mens Protex Gripped Ankle Socks (Sky Blue/New Claret)
UMBRO Mens Protex Gripped Ankle Socks (Royal Blue)
UMBRO Mens Protex Gripped Ankle Socks (White/Black)
UMBRO Mens Protex Gripped Ankle Socks (Vermillion)
UMBRO Mens Protex Gripped Ankle Socks (New Claret)
UMBRO Mens Protex Gripped Ankle Socks (Navy)
UMBRO Mens Protex Gripped Ankle Socks (Black)
Gallery item 1 out of 7
UMBRO Mens Protex Gripped Ankle Socks (Sky Blue/New Claret)
7 colors
Sold and shipped by Pertemba GB
£19.49
CANTERBURY Mens Playing Rugby Sport Socks (White)
CANTERBURY Mens Playing Rugby Sport Socks (Navy)
CANTERBURY Mens Playing Rugby Sport Socks (Black)
CANTERBURY Mens Playing Rugby Sport Socks (Red)
Gallery item 1 out of 4
CANTERBURY Mens Playing Rugby Sport Socks (White)
4 colors
Sold and shipped by Pertemba GB
£17.49
1000 MILE Mens Approach Socks (Charcoal)
1000 MILE Mens Approach Socks (Navy)
Gallery item 1 out of 2
1000 MILE Mens Approach Socks (Charcoal)
2 colors
Sold and shipped by Pertemba GB
£15.49
ELLESSE ELLESSE MEN'S 6PK CREW SOCKS
ELLESSE ELLESSE MEN'S 6PK CREW SOCKS
Gallery item 1 out of 2
ELLESSE ELLESSE MEN'S 6PK CREW SOCKS
2 colors
Sold and shipped by Orrsum
£19.99
DARE 2B Unisex Adult Socks (Pack of 2) (Puffins Orange/Black)
DARE 2B Unisex Adult Socks (Pack of 2) (Puffins Orange/Black)
Sold and shipped by Pertemba GB
£9.49
HO SOCCER HO Soccer Raven Padded GK Tight Shorts
HO SOCCER HO Soccer Raven Padded GK Tight Shorts
Sold and shipped by Just Keepers Ltd
£30.00
1000 MILE Mens Lite Recycled Ankle Socks (Silver/Royal Blue)
1000 MILE Mens Lite Recycled Ankle Socks (Silver/Royal Blue)
Sold and shipped by Pertemba GB
£13.49
REGATTA Mens Lifestyle Socks (Pack of 4) (Black)
REGATTA Mens Lifestyle Socks (Pack of 4) (Black)
Sold and shipped by Pertemba GB
£11.99
AZENGEAR Compression Socks for Men & Women (20-30 mmHg) (Black/White, Pair)
AZENGEAR Compression Socks for Men & Women (20-30 mmHg) (Black/White, Pair)
Sold and shipped by aZengear
From £12.95£14.95
DARE 2B Unisex Adult Ambling Walking Socks (Lichen Green)
DARE 2B Unisex Adult Ambling Walking Socks (Pelican)
Gallery item 1 out of 2
DARE 2B Unisex Adult Ambling Walking Socks (Lichen Green)
2 colors
Sold and shipped by Pertemba GB
£6.99
DARE 2B Unisex Adult Festivity Fair Isle Fluffy Christmas Socks (Beetroot/Powder Pink)
DARE 2B Unisex Adult Festivity Fair Isle Fluffy Christmas Socks (Moonlight Denim/Navy)
Gallery item 1 out of 2
DARE 2B Unisex Adult Festivity Fair Isle Fluffy Christmas Socks (Beetroot/Powder Pink)
2 colors
Sold and shipped by Pertemba GB
£5.49
REGATTA Mens Samaris Trail Ankle Socks (Pack of 2) (Black/Dark Steel)
REGATTA Mens Samaris Trail Ankle Socks (Pack of 2) (Navy/Dark Red)
Gallery item 1 out of 2
REGATTA Mens Samaris Trail Ankle Socks (Pack of 2) (Black/Dark Steel)
2 colors
Sold and shipped by Pertemba GB
£13.99
UMBRO Mens Classico Socks (Royal Blue)
UMBRO Mens Classico Socks (Sky Blue)
UMBRO Mens Classico Socks (Purple Cactus/White)
UMBRO Mens Classico Socks (Beetroot Purple/Black)
UMBRO Mens Classico Socks (Shocking Orange)
UMBRO Mens Classico Socks (Black)
UMBRO Mens Classico Socks (Carbon/White)
UMBRO Mens Classico Socks (Yellow)
UMBRO Mens Classico Socks (Navy/White)
UMBRO Mens Classico Socks (Emerald)
UMBRO Mens Classico Socks (Green Gecko)
UMBRO Mens Classico Socks (Safety Yellow/Carbon)
UMBRO Mens Classico Socks (White)
UMBRO Mens Classico Socks (Blazing Yellow/Carbon)
UMBRO Mens Classico Socks (Vermillion)
Gallery item 1 out of 15
UMBRO Mens Classico Socks (Royal Blue)
15 colors
Sold and shipped by Pertemba GB
£10.49
CRAGHOPPERS Men's Glencoe Walking Sock
CRAGHOPPERS Glencoe Walking Socks
CRAGHOPPERS Men's Glencoe Walking Sock
Gallery item 1 out of 3
CRAGHOPPERS Men's Glencoe Walking Sock
3 colors
Sold and shipped by Official Craghoppers UK Ltd.
£11.95£18.00
UMBRO Mens Leg Sleeves (Green Gecko)
UMBRO Mens Leg Sleeves (Sky Blue)
UMBRO Mens Leg Sleeves (Purple Cactus/White)
UMBRO Mens Leg Sleeves (New Claret)
UMBRO Mens Leg Sleeves (Black)
UMBRO Mens Leg Sleeves (Vermillion)
UMBRO Mens Leg Sleeves (Yellow)
UMBRO Mens Leg Sleeves (Emerald)
UMBRO Mens Leg Sleeves (Navy/White)
UMBRO Mens Leg Sleeves (White)
UMBRO Mens Leg Sleeves (Royal Blue)
UMBRO Mens Leg Sleeves (Safety Yellow/Carbon)
UMBRO Mens Leg Sleeves (Carbon/White)
Gallery item 1 out of 13
UMBRO Mens Leg Sleeves (Green Gecko)
13 colors
Sold and shipped by Pertemba GB
£9.49
DARE 2B Unisex Adult Essentials Sports Ankle Socks (Pack of 3) (Black)
DARE 2B Unisex Adult Essentials Sports Ankle Socks (Pack of 3) (White)
Gallery item 1 out of 2
DARE 2B Unisex Adult Essentials Sports Ankle Socks (Pack of 3) (Black)
2 colors
Sold and shipped by Pertemba GB
£11.49
RHINO Mens Sports Base Layer Shorts (White)
RHINO Mens Sports Base Layer Shorts (Red)
RHINO Mens Sports Base Layer Shorts (Navy)
RHINO Mens Sports Base Layer Shorts (Light Blue)
RHINO Mens Sports Base Layer Shorts (Heather Grey)
RHINO Mens Sports Base Layer Shorts (Black)
RHINO Mens Sports Base Layer Shorts (Bottle Green)
RHINO Mens Sports Base Layer Shorts (Royal)
Gallery item 1 out of 8
RHINO Mens Sports Base Layer Shorts (White)
8 colors
Sold and shipped by Pertemba GB
£18.99
1000 MILE Mens Fusion Ankle Socks (Black/Orange)
1000 MILE Mens Fusion Ankle Socks (Black/Green)
1000 MILE Mens Fusion Ankle Socks (White/Grey)
Gallery item 1 out of 3
1000 MILE Mens Fusion Ankle Socks (Black/Orange)
3 colors
Sold and shipped by Pertemba GB
£15.49
CRAGHOPPERS Men's Wool Hiker Sock
CRAGHOPPERS Men's Wool Hiker Sock
Sold and shipped by Official Craghoppers UK Ltd.
£11.95£18.00
PUMA Unisex Adult Invisible Socks (Pack of 3) (Navy/Light Grey/Black)
PUMA Unisex Adult Invisible Socks (Pack of 3) (Pink/Grey/Charcoal Grey)
PUMA Unisex Adult Invisible Socks (Pack of 3) (Pink)
PUMA Unisex Adult Invisible Socks (Pack of 3) (White)
PUMA Unisex Adult Invisible Socks (Pack of 3) (Black)
PUMA Unisex Adult Invisible Socks (Pack of 3) (Black/Red/Grey)
PUMA Unisex Adult Invisible Socks (Pack of 3) (Grey/White/Black)
Gallery item 1 out of 7
PUMA Unisex Adult Invisible Socks (Pack of 3) (Navy/Light Grey/Black)
7 colors
Sold and shipped by Pertemba GB
From £4.49
1000 MILE Mens Lite Ankle Socks (Silver/Royal Blue)
1000 MILE Mens Lite Ankle Socks (Silver/Royal Blue)
Sold and shipped by Pertemba GB
£14.99
RHINO Mens Sports Base Layer Short Sleeve TShirt (Navy)
RHINO Mens Sports Base Layer Short Sleeve TShirt (White)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Bottle Green)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Purple)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Light Blue)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Red)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Royal)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Green)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Black)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Pink)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Navy Heather)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Black Heather)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Maroon)
Gallery item 1 out of 13
RHINO Mens Sports Base Layer Short Sleeve TShirt (Navy)
13 colors
Sold and shipped by Pertemba GB
From £23.99
ADIDAS Manchester United 23/24 Away Socks
ADIDAS Manchester United 23/24 Away Socks
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£20.00
ADIDAS Arsenal 23/24 Home Socks
ADIDAS Arsenal 23/24 Home Socks
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£20.00
ADIDAS Arsenal 23/24 Away Socks
ADIDAS Arsenal 23/24 Away Socks
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£20.00
ADIDAS Manchester United 23/24 Home Socks
ADIDAS Manchester United 23/24 Home Socks
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£20.00
SPEEDO Speedo Men's Wall Spray 17cm Brief - Salso/ Olive
SPEEDO Speedo Men's Wall Spray 17cm Brief - Salso/ Olive
Sold and shipped by ProSwimwear LTD
£23.99
ADIDAS adidas Football GRIP Knitted Crew Light Performance Socks
ADIDAS adidas Football GRIP Knitted Crew Light Performance Socks
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£23.00
ADIDAS Ajax Amsterdam 23/24 Socks
ADIDAS Ajax Amsterdam 23/24 Socks
Rate: 5.0 stars, 1 votes
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£20.00
ADIDAS Leicester City FC 23/24 Home Socks
ADIDAS Leicester City FC 23/24 Home Socks
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£20.00
OUTSHOCK MMA / Grappling 500 Rashguard
OUTSHOCK MMA / Grappling 500 Rashguard
Rate: 4.6 stars, 55 votes
£27.99
TRIBORD MEN'S SAILING BASE LAYER TOP RACE 500 - BLACK
TRIBORD MEN'S SAILING BASE LAYER TOP RACE 500 - BLACK
Rate: 4.3 stars, 23 votes
£27.99
Was £37.99
KIPSTA Football Socks CLR - Black
KIPSTA Football Socks CLR - Blue
Gallery item 1 out of 2
KIPSTA Football Socks CLR - Black
Rate: 4.6 stars, 26 votes
£7.99
WEDZE Men’s Thermal Merino Wool Ski Base Layer - BL 900 Bottoms - Navy blue
WEDZE Men’s Thermal Merino Wool Ski Base Layer - BL 900 Bottoms - Navy blue
Rate: 4.7 stars, 31 votes
£39.99£49.99
4.5/5 based on 436045 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.