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.
88 items
QUECHUA Hiking Socks Hike 500 Mid x2 Pairs - Grey and Red
QUECHUA Hiking socks - Hike 500 Mid Black x2 pairs
QUECHUA Hiking Socks Hike 500 Mid 2-Pack - grey yellow
QUECHUA Hiking socks - Hike 500 Mid x2 pairs Mint Green
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QUECHUA Hiking Socks Hike 500 Mid x2 Pairs - Grey and Red
Rate: 4.6 stars, 2726 votes
4 colors
£12.99
KIPSTA Football Socks Viralto Solo - Pink/Red Stripes
KIPSTA Football Socks Viralto Club - Green
KIPSTA Football Socks Viralto Club - Navy Blue
KIPSTA Football Socks Viralto Club - Purple
KIPSTA Football Socks Viralto Club - Orange
KIPSTA Football Socks Viralto Club - Red
KIPSTA Football Socks Viralto Club - Yellow
KIPSTA Football Socks Viralto Club - White
KIPSTA Football Socks Viralto Club - Black
KIPSTA Football Socks Viralto Club - Blue
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KIPSTA Football Socks Viralto Solo - Pink/Red Stripes
Rate: 4.5 stars, 3699 votes
10 colors
£5.99
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Yellow
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Green
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Khaki
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - White
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Mottled Grey
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Navy Blue
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Indigo Blue
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Red
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Black
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Orange
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Purple
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KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Yellow
Rate: 4.7 stars, 4397 votes
11 colors
£9.99£17.99
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - White
KIPSTA Short-Sleeved Keepdry - Mottled Grey
KIPSTA Adult Short-Sleeved Football Base Layer Keepdry - Red
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - Black
KIPSTA Adult Short-Sleeved Football Base Layer Keepdry - Navy Blue
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KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - White
Rate: 4.7 stars, 798 votes
5 colors
£14.99
KIPRUN Run900 Mid-Calf Thick Running Socks - Red/Yellow
KIPRUN RUN900 RUN WILD THICK MIDCALF RUNNING SOCKS - ORANGE
KIPRUN RUN900 EP. MID-CALF RUNNING SOCKS MADE IN FRANCE
KIPRUN RUN900 MID-CALF THICK RUNNING SOCKS
KIPRUN Run900 Mid-Calf Thick Running Socks - White/Red
KIPRUN RUN900 RUN WILD THICK MIDCALF RUNNING SOCKS - WHITE BLACK
KIPRUN RUN900 MID-CALF THICK RUNNING SOCKS
KIPRUN Run900 Mid-Calf Thick Running Socks - White/Green/Red
KIPRUN Run900 Mid-Calf Thick Running Socks - Black/Red/Yellow
KIPRUN Run900 Mid-Calf Thick Running Socks - Green/Red
KIPRUN Run900 Mid-Calf Thick Running Socks - White/Red
KIPRUN RUN900 MID-CALF THICK RUNNING SOCKS - PHOSPHORESCENT
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KIPRUN Run900 Mid-Calf Thick Running Socks - Red/Yellow
Rate: 4.7 stars, 477 votes
12 colors
£7.99£9.99
KIPSTA Mid-Rise Grippy Football Socks Viralto MiD II - Yellow
KIPSTA Mid-Rise Grippy Football Socks Viralto MiD II - Blue
KIPSTA Short Grippy Football Socks Viralto MiD - Red
KIPSTA Short Grippy Football Socks Viralto MiD - Black
KIPSTA Short Grippy Football Socks Viralto MiD - White
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KIPSTA Mid-Rise Grippy Football Socks Viralto MiD II - Yellow
Rate: 4.5 stars, 455 votes
5 colors
£7.99
Was £8.49
KIPSTA Adult Football Socks Essential - Blue
KIPSTA Adult Football Socks Essential - White
KIPSTA Adult Football Socks Essential Club - Red
KIPSTA Adult Football Socks Essential Club - Black
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KIPSTA Adult Football Socks Essential - Blue
Rate: 4.3 stars, 2548 votes
4 colors
£2.99
Was £3.99
OFFLOAD Adult Knee-Length Rugby Socks R500 - Black
OFFLOAD Adult Knee-Length Rugby Socks R500 - Red
OFFLOAD Knee-Length Rugby Socks R500 - Blue
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OFFLOAD Adult Knee-Length Rugby Socks R500 - Black
Rate: 4.6 stars, 232 votes
3 colors
£5.99
WEDZE ADULT SKI SOCKS - 500 - NAVY BLUE RED
WEDZE ADULT SKI SOCKS - 500 - NAVY BLUE RED
Rate: 4.5 stars, 1652 votes
£5.99£12.99
DOMYOS Men's Cotton Boxers Twin-Pack - Grey/Red
DOMYOS Men's Cotton Boxers Twin-Pack - Grey/Red
£14.99
KOROK Adult Field Hockey Socks FH500 - White
KOROK Adult Field Hockey Socks FH500 - Black
KOROK Adult Field Hockey Socks FH500 - Blue
KOROK Adult Field Hockey Socks FH500 - Neon Pink
KOROK Adult Field Hockey Socks FH500 - Neon Orange
KOROK Adult Field Hockey Socks FH500 - Green
KOROK Adult Field Hockey Socks FH500 - Red
KOROK Adult Field Hockey Socks FH500 - Neon Yellow
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KOROK Adult Field Hockey Socks FH500 - White
8 colors
£9.99
QUECHUA Warm Hiking Socks - SH900 MOUNTAIN MID - 2 Pairs
QUECHUA Warm Hiking Socks - SH900 MOUNTAIN MID - 2 Pairs
Rate: 4.4 stars, 107 votes
£24.99
KIPSTA Adult Football Undershorts Keepdry 500 - White
KIPSTA Adult Football Undershorts Keepdry 500 - Navy Blue
KIPSTA Adult Football Undershorts Keepdry 500 - Red
KIPSTA Adult Football Undershorts Keepdry 500 - Yellow
KIPSTA Adult Football Undershorts Keepdry 500 - Purple
KIPSTA Adult Football Undershorts Keepdry 500 - Orange
KIPSTA Adult Football Undershorts Keepdry 500 - Green
KIPSTA Adult Football Undershorts Keepdry 500 - Black
KIPSTA Adult Football Undershorts Keepdry 500 - Indigo Blue
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KIPSTA Adult Football Undershorts Keepdry 500 - White
Rate: 4.5 stars, 188 votes
9 colors
£14.99
Was £19.99
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
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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
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
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INOVIK MEN’S THERMAL CROSS-COUNTRY SKI BASE LAYER 900 – BLACK RED
Rate: 4.6 stars, 134 votes
3 colors
£14.99£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
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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
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 FC Bayern 23/24 Home Socks
ADIDAS FC Bayern 23/24 Home Socks
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ADIDAS FC Bayern 23/24 Home Socks
2 colors
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£20.00
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
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
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TCA Men's HyperFusion Breathable Base Layer Compression T-shirt - White
7 colors
Sold and shipped by Thorogood Sports Ltd
£16.99
TCA Men's Performance Base Layer Compression T-shirt - Dazzling Blue
TCA Men's Pro Performance Baselayer Short Sleeve Top
TCA Men's Performance Base Layer Compression T-shirt - Darkest Spruce
TCA Men's Performance Base Layer Compression T-shirt - Team Red
TCA Men's Performance Base Layer Compression T-shirt - Sonic Yellow
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TCA Men's Performance Base Layer Compression T-shirt - Dazzling Blue
Rate: 4.7 stars, 3 votes
5 colors
Sold and shipped by Thorogood Sports Ltd
£14.99
OFFLOAD Adult Mid-High Rugby Socks R520 - Black
OFFLOAD Adult Mid Rugby Socks R520 - White
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OFFLOAD Adult Mid-High Rugby Socks R520 - Black
Rate: 4.6 stars, 21 votes
2 colors
£9.99
TARMAK Adult Sleeveless Basketball Base Layer Jersey UT500 - NBA Boston Celtics/Black
TARMAK Adult Sleeveless Basketball Base Layer Jersey UT500 - NBA Los Angeles Lakers/Black
TARMAK Adult Sleeveless Basketball Base Layer Jersey UT500 - NBA Chicago Bulls/Red
TARMAK Adult Sleeveless Basketball Base Layer Jersey UT500 - NBA Golden State Warriors/Blue
TARMAK Adult Sleeveless Basketball Base Layer Jersey UT500 NBA Los Angeles Lakers/White
TARMAK Adult Sleeveless Basketball Base Layer Jersey UT500 - NBA Brooklyn Nets/White
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TARMAK Adult Sleeveless Basketball Base Layer Jersey UT500 - NBA Boston Celtics/Black
Rate: 4.7 stars, 164 votes
6 colors
£19.99
AKRON Akron Men's Adi Nine Brief - Red / Blue
AKRON Akron Men's Adi Nine Brief - Red / Blue
Sold and shipped by ProSwimwear LTD
£18.99
TCA Men's HyperFusion Breathable Base Layer Compression Top - Mock - High Risk Red
TCA Men's HyperFusion Breathable Base Layer Compression Top - Mock - Cadmium Green
TCA Men's HyperFusion Breathable Base Layer Compression Top - Mock - White
TCA Men's HyperFusion Breathable Base Layer Compression Top - Mock - Black
TCA Men's HyperFusion Breathable Base Layer Compression Top - Mock - Navy Blazer
TCA Men's HyperFusion Breathable Base Layer Compression Top - Mock - Dazzling Blue
TCA Men's HyperFusion Breathable Base Layer Compression Top - Mock - Lime Punch
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TCA Men's HyperFusion Breathable Base Layer Compression Top - Mock - High Risk Red
7 colors
Sold and shipped by Thorogood Sports Ltd
£18.99
ADIDAS Spain 24 Home Socks
ADIDAS Spain 24 Home Socks
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£20.00
SPEEDO Speedo Kaleidoscope 17cm Brief - Black/ Blue/ Adriatic/ Tangerine
SPEEDO Speedo Kaleidoscope 17cm Brief - Black/ Blue/ Adriatic
SPEEDO Speedo Kaleidoscope 17cm Brief - Black/ Blue/ Adriatic/ Tangerine
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SPEEDO Speedo Kaleidoscope 17cm Brief - Black/ Blue/ Adriatic/ Tangerine
3 colors
Sold and shipped by ProSwimwear LTD
£27.99
TCA Men's Performance Base Layer Compression Shorts - Blueprint
TCA Men's Performance Base Layer Compression Shorts - Forest Night
TCA Men's Performance Base Layer Compression Shorts - Black Stealth
TCA Men's Performance Base Layer Compression Shorts - Grey Marl
TCA Men's Performance Base Layer Compression Shorts - Cabernet
TCA Men's Performance Base Layer Compression Shorts - Pro White
TCA Men's Performance Base Layer Compression Shorts - White
Gallery item 1 out of 7
TCA Men's Performance Base Layer Compression Shorts - Blueprint
Rate: 3.4 stars, 5 votes
7 colors
Sold and shipped by Thorogood Sports Ltd
£18.99
GILBERT Training II Socks, Green
GILBERT Training II Socks, White
GILBERT Training II Socks, Red
GILBERT Training II Socks, Black
GILBERT Training II Socks, Dark Navy
GILBERT Training II Socks, Red
GILBERT Training II Socks, Green
GILBERT Training II Socks, Royal
GILBERT Training II Socks, White
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GILBERT Training II Socks, Green
9 colors
Sold and shipped by Bowls4u T/A 4U Trading Group
£13.40
PUMA Puma Quarter Training Socks (3 Pairs)
PUMA Puma Quarter Training Socks (3 Pairs)
PUMA Puma Quarter Training Socks (3 Pairs)
PUMA Puma Quarter Training Socks (3 Pairs)
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PUMA Puma Quarter Training Socks (3 Pairs)
4 colors
Sold and shipped by Bowls4u T/A 4U Trading Group
£10.58
BRIDGEDALE TRAIL RUN Lightweight T2 Merino Sport 3/4 Crew Men's - Black
BRIDGEDALE TRAIL RUN Lightweight T2 Merino Sport 3/4 Crew Men's - Red
BRIDGEDALE TRAIL RUN Lightweight T2 Merino Sport 3/4 Crew Men's - Blue
BRIDGEDALE TRAIL RUN Ultralight T2 Merino Sport 3/4 Crew Men's - Light Grey
BRIDGEDALE TRAIL RUN Ultralight T2 Merino Sport 3/4 Crew Men's - Black
BRIDGEDALE TRAIL RUN Ultralight T2 Merino Sport 3/4 Crew Men's - Blue
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BRIDGEDALE TRAIL RUN Lightweight T2 Merino Sport 3/4 Crew Men's - Black
6 colors
Sold and shipped by Bowls4u T/A 4U Trading Group
From £17.31
PUMA Puma Quarter Training Socks (3 Pairs)
PUMA Puma Quarter Training Socks (3 Pairs)
Sold and shipped by Bowls4u T/A 4U Trading Group
£10.58
1000 MILE 1000 Mile Lite Anklet Repreve Double Layer Sock Silver/Red
1000 MILE 1000 Mile Lite Anklet Repreve Double Layer Sock Silver/Red
Sold and shipped by Bowls4u T/A 4U Trading Group
£12.50
BRIDGEDALE HIKE Lightweight T2 Coolmax Performance Boot Men's - Navy blue
BRIDGEDALE HIKE Lightweight T2 Coolmax Performance Boot Men's - Navy blue
Sold and shipped by Sock Snob UK
£23.03£23.99
BRIDGEDALE TRAIL RUN Ultralight T2 Merino Sport Low Men's - Black
BRIDGEDALE TRAIL RUN Ultralight T2 Merino Sport Low Men's - Light Grey
BRIDGEDALE TRAIL RUN Ultralight T2 Merino Sport Low Men's - Red
BRIDGEDALE TRAIL RUN Ultralight T2 Merino Sport Low Men's - Blue
Gallery item 1 out of 4
BRIDGEDALE TRAIL RUN Ultralight T2 Merino Sport Low Men's - Black
4 colors
Sold and shipped by Bowls4u T/A 4U Trading Group
From £16.90
BRIDGEDALE HIKE Ultralight T2 Merino Performance Low Men's - Navy blue
BRIDGEDALE HIKE Ultralight T2 Merino Performance Low Men's - Grey
BRIDGEDALE Bridgedale Hike Ultralight T2 Merino Enkelsok - Grijs - Dames
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BRIDGEDALE HIKE Ultralight T2 Merino Performance Low Men's - Navy blue
3 colors
Sold and shipped by Sock Snob UK
£23.03£23.99
HEAT HOLDERS Mens Extra Long Thick Knee High Thermal Socks
HEAT HOLDERS Mens Extra Long Thick Knee High Thermal Socks
HEAT HOLDERS Mens Extra Long Thick Knee High Thermal Socks
HEAT HOLDERS Mens Extra Long Thick Knee High Thermal Socks
HEAT HOLDERS Mens Extra Long Thick Knee High Thermal Socks
HEAT HOLDERS Mens Extra Long Thick Knee High Thermal Socks
HEAT HOLDERS Mens Extra Long Thick Knee High Thermal Socks
HEAT HOLDERS Mens Extra Long Thick Knee High Thermal Socks
Gallery item 1 out of 8
HEAT HOLDERS Mens Extra Long Thick Knee High Thermal Socks
8 colors
Sold and shipped by Sock Snob UK
£12.47£12.99
PUMA Puma Sneaker Invisible Socks (3 Pairs)
PUMA Puma Sneaker Invisible Socks (3 Pairs)
PUMA Puma Sneaker Invisible Socks (3 Pairs)
PUMA Puma Sneaker Invisible Socks (3 Pairs)
PUMA Puma Sneaker Invisible Socks (3 Pairs)
PUMA Puma Sneaker Invisible Socks (3 Pairs)
PUMA Puma Sneaker Invisible Socks (3 Pairs)
Gallery item 1 out of 7
PUMA Puma Sneaker Invisible Socks (3 Pairs)
7 colors
Sold and shipped by Bowls4u T/A 4U Trading Group
£10.58
PUMA Puma Quarter Training Socks (3 Pairs)
PUMA Puma Quarter Training Socks (3 Pairs)
PUMA Puma Quarter Training Socks (3 Pairs)
PUMA Puma Quarter Training Socks (3 Pairs)
PUMA Puma Quarter Training Socks (3 Pairs)
PUMA Puma Quarter Training Socks (3 Pairs)
PUMA Puma Quarter Training Socks (3 Pairs)
Gallery item 1 out of 7
PUMA Puma Quarter Training Socks (3 Pairs)
7 colors
Sold and shipped by Bowls4u T/A 4U Trading Group
£10.58
HEAT HOLDERS Mens Winter Non Slip Warm Thermal Slipper Socks with Grips
HEAT HOLDERS Mens Winter Non Slip Warm Thermal Slipper Socks with Grips
HEAT HOLDERS Mens Winter Non Slip Warm Thermal Slipper Socks with Grips
HEAT HOLDERS Mens Winter Non Slip Warm Thermal Slipper Socks with Grips
HEAT HOLDERS Mens Winter Non Slip Warm Thermal Slipper Socks with Grips
Gallery item 1 out of 5
HEAT HOLDERS Mens Winter Non Slip Warm Thermal Slipper Socks with Grips
5 colors
Sold and shipped by Sock Snob UK
£13.43£13.99
4.3/5 based on 19851 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.