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.
940 items
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
Gallery item 1 out of 5
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
AKRON Akron Mens Addison Evo Bicolour Brief- Orange / Black
AKRON Akron Mens Addison Evo Bicolour Brief- Orange / Black
Sold and shipped by ProSwimwear LTD
£14.99
SPEEDO Speedo Men's Rip It Up 17cm Brief - Black/ Lime
SPEEDO Speedo Men's Rip It Up 17cm Brief - Black/ Lime
Sold and shipped by ProSwimwear LTD
£23.99
ODLO ODLO Men's Blackcomb Base Layer
ODLO ODLO Men's Blackcomb Base Layer
Sold and shipped by Baselayer Ltd
£70.00
SPEEDO Speedo Latex Sock - White
SPEEDO Speedo Latex Sock - White
Sold and shipped by Bowls4u T/A 4U Trading Group
£10.40
AKRON Akron Men's Gulliver Brief - Blue
AKRON Akron Men's Gulliver Brief - Blue
Sold and shipped by ProSwimwear LTD
£17.99
TYR TYR Boy's Durafast Elite Solid Racer Brief - Royal Blue
TYR TYR Boy's Durafast Elite Solid Racer Brief - Royal Blue
Sold and shipped by ProSwimwear LTD
£8.99
SPEEDO Speedo ECO Endurance+ 17cm Brief - Black
SPEEDO Speedo ECO Endurance+ 17cm Brief - Black
Sold and shipped by ProSwimwear LTD
£25.99
AKRON Akron Men's Element Earth Brief - Green
AKRON Akron Men's Element Earth Brief - Green
Sold and shipped by ProSwimwear LTD
£20.99
ADIDAS Crew Golf Socks 3 Pairs
ADIDAS Crew Golf Socks 3 Pairs
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£15.00
KIPSTA Mid Sports Socks - White
KIPSTA Mid Sports Socks - White
Rate: 4.7 stars, 57 votes
£5.99
FOUGANZA Adult Horse Riding Socks 500 Warm - Grey/Black
FOUGANZA Adult Horse Riding Socks 500 Warm - Blue/Green
Gallery item 1 out of 2
FOUGANZA Adult Horse Riding Socks 500 Warm - Grey/Black
Rate: 4.5 stars, 157 votes
2 colors
£9.99
WEDZE Men's ski thermal base layer BL 980 seamless ultra-breathable top GREY
WEDZE Men's ski thermal base layer BL 980 seamless ultra-breathable top GREY
Rate: 4.6 stars, 82 votes
£49.99
ALLSIX Mid Volleyball Socks VSK500 - Black
ALLSIX Mid Volleyball Socks VSK500 - White
Gallery item 1 out of 2
ALLSIX Mid Volleyball Socks VSK500 - Black
Rate: 4.6 stars, 190 votes
2 colors
£5.49
ALLSIX Volleyball High Socks VSK500 - Blue
ALLSIX High Volleyball Socks VSK500 - Yellow
ALLSIX Volleyball High Socks VSK500 - White
ALLSIX High Volleyball Socks VSK500 - Navy
ALLSIX Volleyball High Socks VSK500 - Pink
ALLSIX Volleyball High Socks VSK500 - Green
Gallery item 1 out of 6
ALLSIX Volleyball High Socks VSK500 - Blue
Rate: 4.6 stars, 211 votes
6 colors
£3.99£4.99
KOROK Adult High-Intensity Field Hockey Socks FH900 - Navy Blue
KOROK Adult High Intensity Field Hockey Socks FH900 - White
KOROK Adult High Intensity Field Hockey Socks FH900 - Black
Gallery item 1 out of 3
KOROK Adult High-Intensity Field Hockey Socks FH900 - Navy Blue
Rate: 4.5 stars, 6 votes
3 colors
£14.99
OFFLOAD Adult Mid-High Rugby Socks R520 - Black
OFFLOAD Adult Mid Rugby Socks R520 - White
Gallery item 1 out of 2
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 Chicago Bulls/Red
TARMAK Adult Sleeveless Basketball Base Layer Jersey UT500 - NBA Los Angeles Lakers/Black
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
Gallery item 1 out of 6
TARMAK Adult Sleeveless Basketball Base Layer Jersey UT500 - NBA Boston Celtics/Black
Rate: 4.8 stars, 165 votes
6 colors
£19.99
NEWFEEL Invisible walking socks - pack of 2 pairs - white/grey
NEWFEEL Invisible walking socks - pack of 2 pairs - black
Gallery item 1 out of 2
NEWFEEL Invisible walking socks - pack of 2 pairs - white/grey
Rate: 4.5 stars, 20 votes
2 colors
£7.99
KIPSTA Adult High and Grippy Football Socks Viralto II - White
KIPSTA Adult High and Grippy Football Socks Viralto II - Red
KIPSTA Adult High and Grippy Football Socks Viralto II - Mauve
KIPSTA Adult High and Grippy Football Socks Viralto II - Black
KIPSTA Adult High and Grippy Football Socks Viralto II - Blue
Gallery item 1 out of 5
KIPSTA Adult High and Grippy Football Socks Viralto II - White
£9.99
TARMAK Men's/Women's Low-Rise NBA Basketball Socks SO900 Twin-Pack - Black
TARMAK Men's/Women's Low-Rise NBA Basketball Socks SO900 Twin-Pack - White
Gallery item 1 out of 2
TARMAK Men's/Women's Low-Rise NBA Basketball Socks SO900 Twin-Pack - Black
Rate: 4.8 stars, 68 votes
2 colors
£14.99
HILLY Hilly Trail Quarter Medium - Zwart - Standaard sok (L/R)
HILLY Hilly Trail Quarter Medium - Turquoise - Standaard sok (L/R) - Dames
Gallery item 1 out of 2
HILLY Hilly Trail Quarter Medium - Zwart - Standaard sok (L/R)
2 colors
Sold and shipped by Rugby Heaven
£15.00
TCA Men's HyperFusion Breathable Base Layer Compression Top - White
TCA Men's HyperFusion Breathable Base Layer Compression Top - Lime Punch
TCA Men's HyperFusion Breathable Base Layer Compression Top - Black
TCA Men's HyperFusion Breathable Base Layer Compression Top - Dazzling Blue
TCA Men's HyperFusion Breathable Base Layer Compression Top - Navy Blazer
TCA Men's HyperFusion Breathable Base Layer Compression Top - Cadmium Green
Gallery item 1 out of 6
TCA Men's HyperFusion Breathable Base Layer Compression Top - White
Rate: 5.0 stars, 1 votes
6 colors
Sold and shipped by Thorogood Sports Ltd
£18.99
ODLO ODLO Men's Blackcomb Eco Warm Leggings
ODLO ODLO Men's Blackcomb Eco Warm Leggings
Sold and shipped by Baselayer Ltd
£65.00
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
Gallery item 1 out of 7
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
AKRON Akron Men's Save The Lioness Brief
AKRON Akron Men's Save The Lioness Brief
Sold and shipped by ProSwimwear LTD
£19.99
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
ODLO ODLO Men's Blackcomb Base Layer
ODLO ODLO Men's Blackcomb Base Layer
Sold and shipped by Baselayer Ltd
£70.00
ADIDAS Ajax Amsterdam 23/24 Away Socks
ADIDAS Ajax Amsterdam 23/24 Away Socks
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£20.00
ROOKIE 16'' Mid Calf Socks
ROOKIE 16'' Mid Calf Socks
Sold and shipped by Kates Skates Ltd
£9.95
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
AKRON Akron Men's Moon Brief - Blue
AKRON Akron Men's Moon Brief - Blue
Sold and shipped by ProSwimwear LTD
£17.99
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
Gallery item 1 out of 3
SPEEDO Speedo Kaleidoscope 17cm Brief - Black/ Blue/ Adriatic/ Tangerine
3 colors
Sold and shipped by ProSwimwear LTD
£27.99
ADIDAS Golf Ankle Socks 3 Pairs
ADIDAS Golf Ankle Socks 3 Pairs
Gallery item 1 out of 2
ADIDAS Golf Ankle Socks 3 Pairs
2 colors
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£12.00
TYR TYR Men's Durafast Elite Solid Racer Brief - Navy
TYR TYR Men's Durafast Elite Solid Racer Brief - Navy
Sold and shipped by ProSwimwear LTD
£8.99
AKRON Akron Men's Element Air Brief - Blue
AKRON Akron Men's Element Air Brief - Blue
Sold and shipped by ProSwimwear LTD
£17.99
AKRON Akron Men's Roman Brief - Yellow
AKRON Akron Men's Roman Brief - Yellow
Sold and shipped by ProSwimwear LTD
£17.99
4.5/5 based on 436990 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.