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.
941 items
QUECHUA Sock Hike 50 Mid 2-Pack - navy
QUECHUA Sock Hike 50 Mid - Pack of 2 pairs - Grey
Gallery item 1 out of 2
QUECHUA Sock Hike 50 Mid 2-Pack - navy
Rate: 4.6 stars, 1593 votes
2 colors
£4.49
KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS
KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS
Gallery item 1 out of 2
KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS
Rate: 4.5 stars, 38 votes
2 colors
£4.99
OROKS IH 500 Hockey Socks
OROKS IH 500 Hockey Socks
Rate: 4.2 stars, 39 votes
£5.99
KIPRUN Running Socks Run 900 X - White / Blue
KIPRUN Running Socks Run 900 X - White / Orange
Gallery item 1 out of 2
KIPRUN Running Socks Run 900 X - White / Blue
Rate: 4.6 stars, 98 votes
2 colors
£17.99
KIPSTA Adult Football Undershorts Keepdry 500 - White
KIPSTA Adult Football Undershorts Keepdry 500 - Orange
KIPSTA Adult Football Undershorts Keepdry 500 - Green
KIPSTA Adult Football Undershorts Keepdry 500 - Indigo Blue
KIPSTA Adult Football Undershorts Keepdry 500 - Red
KIPSTA Adult Football Undershorts Keepdry 500 - Black
KIPSTA Adult Football Undershorts Keepdry 500 - Yellow
KIPSTA Adult Football Undershorts Keepdry 500 - Navy Blue
KIPSTA Adult Football Undershorts Keepdry 500 - Purple
Gallery item 1 out of 9
KIPSTA Adult Football Undershorts Keepdry 500 - White
Rate: 4.5 stars, 188 votes
9 colors
£14.99
Was £19.99
VAN RYSEL Road Cycling Base Layer Training - Khaki
VAN RYSEL Road Cycling Base Layer Training - Black
Gallery item 1 out of 2
VAN RYSEL Road Cycling Base Layer Training - Khaki
Rate: 4.6 stars, 2304 votes
2 colors
£17.99
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry - Aniseed
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - Black
Gallery item 1 out of 2
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry - Aniseed
Rate: 4.7 stars, 1297 votes
2 colors
£7.99£12.99
ADIDAS Adult Football Socks Milano - Navy Blue
ADIDAS Adult Football Socks Milano - Navy Blue
Rate: 4.5 stars, 6 votes
£9.79
SOLOGNAC FULL-LENGTH WARM WOOLEN HUNTING SOCKS 900
SOLOGNAC FULL-LENGTH WARM WOOLEN HUNTING SOCKS 900
Rate: 4.4 stars, 353 votes
£14.99
DOMYOS Invisible Fitness Cardio Training Socks Twin-Pack - Black
DOMYOS Invisible Fitness Socks Twin-Pack
DOMYOS Invisible Fitness Cardio Training Socks Twin-Pack - Blue
DOMYOS Invisible Fitness Socks Twin-Pack
Gallery item 1 out of 4
DOMYOS Invisible Fitness Cardio Training Socks Twin-Pack - Black
Rate: 4.5 stars, 5147 votes
4 colors
£4.99
TCA Men's Power Base Layer Compression Long Sleeve Top - Navy Eclipse
TCA Men's Power Base Layer Compression Long Sleeve Top - High Risk Red
TCA Men's Power Base Layer Compression Long Sleeve Top - Black
TCA Men's Power Base Layer Compression Long Sleeve Top - Army
TCA Men's Power Base Layer Compression Long Sleeve Top - Pro White
TCA Men's Power Base Layer Compression Long Sleeve Top - Black Stealth
TCA Men's Power Base Layer Compression Long Sleeve Top - Darkest Spruce
TCA Men's Power Base Layer Compression Long Sleeve Top - Cabernet
TCA Men's Power Base Layer Compression Long Sleeve Top - Graphite
TCA Men's Power Base Layer Compression Long Sleeve Top - Blueprint
TCA Men's Power Base Layer Compression Long Sleeve Top - Sonic Yellow
TCA Men's Power Base Layer Compression Long Sleeve Top - Lime Punch
TCA Men's Power Base Layer Compression Long Sleeve Top - Dazzling Blue
Gallery item 1 out of 13
TCA Men's Power Base Layer Compression Long Sleeve Top - Navy Eclipse
Rate: 5.0 stars, 2 votes
13 colors
Sold and shipped by Thorogood Sports Ltd
£18.99
FENC'IT Men's Fencing Socks
FENC'IT Men's Fencing Socks
Rate: 4.7 stars, 40 votes
£19.99
INOVIK MEN’S THERMAL CROSS-COUNTRY SKI BASE LAYER 900 – BLACK RED
INOVIK MEN’S THERMAL CROSS-COUNTRY SKI BASE LAYER 900 – BLACK
INOVIK MEN'S THERMAL CROSS-COUNTRY SKI BASE LAYER 900 - GREEN
Gallery item 1 out of 3
INOVIK MEN’S THERMAL CROSS-COUNTRY SKI BASE LAYER 900 – BLACK RED
Rate: 4.6 stars, 134 votes
3 colors
£14.99£19.99
WEDZE Men's BL 520 thermal base layer roll neck ski top - light grey
WEDZE Men's BL 520 skiing base layer with high turtleneck - Dark blue
Gallery item 1 out of 2
WEDZE Men's BL 520 thermal base layer roll neck ski top - light grey
Rate: 4.7 stars, 262 votes
2 colors
£19.99
TCA Men's Pro Performance Baselayer Long Sleeve Mock Neck Top
TCA Men's Pro Performance Baselayer Long Sleeve Mock Neck Top
TCA Men's Pro Performance Baselayer Long Sleeve Mock Neck Top
TCA Men's Pro Performance Baselayer Long Sleeve Mock Neck Top
TCA Men's Pro Performance Baselayer Long Sleeve Mock Neck Top
TCA Men's Performance Base Layer Compression Top - Mock - Dazzling Blue
TCA Men's Performance Base Layer Compression Top - Mock - High Risk Red
TCA Men's Performance Base Layer Compression Top - Mock - Graphite
TCA Men's Performance Base Layer Compression Top - Mock - Darkest Spruce
TCA Men's Performance Base Layer Compression Top - Mock - Black
Gallery item 1 out of 10
TCA Men's Pro Performance Baselayer Long Sleeve Mock Neck Top
Rate: 5.0 stars, 1 votes
10 colors
Sold and shipped by Thorogood Sports Ltd
£18.99
ODLO ODLO Men's Blackcomb Base Layer
ODLO ODLO Men's Blackcomb Base Layer
Sold and shipped by Baselayer Ltd
£70.00
ODLO ODLO Men's Blackcomb Base Layer
ODLO ODLO Men's Blackcomb Base Layer
Sold and shipped by Baselayer Ltd
£70.00
ODLO ODLO Men's Blackcomb Eco Warm Leggings
ODLO ODLO Men's Blackcomb Eco Warm Leggings
Sold and shipped by Baselayer Ltd
£65.00
AKRON Akron Men's Save The Fish Brief
AKRON Akron Men's Save The Fish Brief
Sold and shipped by ProSwimwear LTD
£20.99
TCA Men's Super Thermal Compression Leggings - Black Stealth
TCA Men's Super Thermal Compression Leggings - Black Stealth
Sold and shipped by Thorogood Sports Ltd
£17.99£20.99
ADIDAS adidas Adults Light No-Show Socks 3-Pairs
ADIDAS adidas Adults Light No-Show Socks 3-Pairs
Gallery item 1 out of 2
ADIDAS adidas Adults Light No-Show Socks 3-Pairs
2 colors
Sold and shipped by Rugby Heaven
£12.00
SPEEDO Speedo Allover Digital 13.5cm Briefs - Clearwater Dawn
SPEEDO Speedo Allover Digital 13.5cm Briefs - Clearwater Dawn
Gallery item 1 out of 2
SPEEDO Speedo Allover Digital 13.5cm Briefs - Clearwater Dawn
2 colors
Sold and shipped by ProSwimwear LTD
£19.99
TYR TYR Men's Phoenix Splice Racer Briefs - Black/ Red
TYR TYR Men's Phoenix Splice Racer Briefs - Black/ Red
Sold and shipped by ProSwimwear LTD
£9.99
ADIDAS 3-Stripes Stonewash Crew Socks 3 Pairs
ADIDAS 3-Stripes Stonewash Crew Socks 3 Pairs
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£20.00
ADIDAS Golf Ankle Socks 3 Pairs
ADIDAS Golf Ankle Socks 3 Pairs
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£12.00
ODLO ODLO Men's Blackcomb Eco Warm Leggings
ODLO ODLO Men's Blackcomb Eco Warm Leggings
Sold and shipped by Baselayer Ltd
£65.00
ODLO ODLO Men's Blackcomb Base Layer
ODLO ODLO Men's Blackcomb Base Layer
Sold and shipped by Baselayer Ltd
£70.00
AKRON Akron Men's Save The Shark Brief
AKRON Akron Men's Save The Shark Brief
Sold and shipped by ProSwimwear LTD
From £23.99
SURFANIC Bodyfit Pro Zip Neck Black
SURFANIC Bodyfit Pro Zip Neck Black
Sold and shipped by Surfanic
£30.00£69.99
ADIDAS FC Bayern 23/24 Home Socks
ADIDAS FC Bayern 23/24 Home Socks
Gallery item 1 out of 2
ADIDAS FC Bayern 23/24 Home Socks
2 colors
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£20.00
TCA Men's Super Thermal Compression Top - Black Stealth
TCA Men's Super Thermal Compression Top - Black Stealth
Sold and shipped by Thorogood Sports Ltd
£17.99£20.99
DLX Mens Base Layer Leggings Thermal Merino Wool Fitchner
DLX Mens Base Layer Leggings Thermal Merino Wool Fitchner
Sold and shipped by DLX
£46.99
SPEEDO Speedo Allover Digital 14cm Brief - Black/ Red/ Blue/ Ultraviolet
SPEEDO Speedo Allover Digital 14cm Brief - Black/ Red/ Blue/ Ultraviolet
Sold and shipped by ProSwimwear LTD
£29.99
ODLO ODLO Men's Blackcomb Eco Warm Leggings
ODLO ODLO Men's Blackcomb Eco Warm Leggings
Sold and shipped by Baselayer Ltd
£65.00
SURFANIC CarbonDri Bodyfit Crewneck Black
SURFANIC CarbonDri Bodyfit Crewneck Dark Khaki
Gallery item 1 out of 2
SURFANIC CarbonDri Bodyfit Crewneck Black
2 colors
Sold and shipped by Surfanic
£19.99£30.00
ODLO ODLO Men's Blackcomb Base Layer
ODLO ODLO Men's Blackcomb Base Layer
Sold and shipped by Baselayer Ltd
£70.00
ARENA Arena Crazy Gummy Low Waist Swim Short - White/Multi
ARENA Arena Crazy Gummy Low Waist Swim Short - White/Multi
Sold and shipped by ProSwimwear LTD
£35.99
DLX Mens Base Layer Top Long Sleeve Thermal Quick Dry Round Neck Wexler
DLX Mens Base Layer Top Long Sleeve Thermal Quick Dry Round Neck Wexler
Sold and shipped by DLX
£66.99
TCA Men's HyperFusion Breathable Base Layer Compression T-shirt - White
TCA Men's HyperFusion Breathable Base Layer Compression T-shirt - Black
TCA Men's HyperFusion Breathable Base Layer Compression T-shirt - Cadmium Green
TCA Men's HyperFusion Breathable Base Layer Compression T-shirt - Navy Blazer
TCA Men's HyperFusion Breathable Base Layer Compression T-shirt - Dazzling Blue
TCA Men's HyperFusion Breathable Base Layer Compression T-shirt - Lime Punch
TCA Men's HyperFusion Breathable Base Layer Compression T-shirt - High Risk Red
Gallery item 1 out of 7
TCA Men's HyperFusion Breathable Base Layer Compression T-shirt - White
7 colors
Sold and shipped by Thorogood Sports Ltd
£16.99
SURFANIC CarbonDri Bodyfit Zip Neck Black
SURFANIC CarbonDri Bodyfit Zip Neck Dark Khaki
Gallery item 1 out of 2
SURFANIC CarbonDri Bodyfit Zip Neck Black
2 colors
Sold and shipped by Surfanic
£21.99£35.00
4.5/5 based on 434117 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.