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.
296 items
DECATHLON Men's Breathable Microfibre Boxers Tri-Pack - Dark Blue/Blue/Khaki
DECATHLON Men's Breathable Microfibre Boxers Tri-Pack - Dark Blue/Blue/Khaki
£14.99
Was £17.99
KIPRUN PACK OF 2 PAIRS OF RUN 500 THICK MID RUNNING SOCKS
KIPRUN PACK OF 2 PAIRS OF RUN 500 THICK MID RUNNING SOCKS
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KIPRUN PACK OF 2 PAIRS OF RUN 500 THICK MID RUNNING SOCKS
2 colors
£5.99
VAN RYSEL Summer Road Cycling Socks 900 - Yellow
VAN RYSEL 900 Summer Road Cycling Socks - Black
VAN RYSEL Summer Road Cycling Socks 900 - Black
VAN RYSEL Cycling Socks 900
VAN RYSEL Cycling Socks 900
VAN RYSEL Summer Road Cycling Socks 900 - Blue
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VAN RYSEL Summer Road Cycling Socks 900 - Yellow
Rate: 4.7 stars, 767 votes
6 colors
£8.99
Was £9.99
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
QUECHUA Hiking Socks Hike 500 Mid x2 Pairs - Grey and Red
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QUECHUA Hiking socks - Hike 500 Mid Black x2 pairs
Rate: 4.6 stars, 2726 votes
4 colors
£12.99
ARTENGO Low Sports Socks RS 160 Tri-Pack - Orange/Beige/White
ARTENGO Low Sports Socks RS 160 Tri-Pack - Sky Blue/White/Pink
ARTENGO Low Tennis Socks RS 160 Tri-Pack - Green/White/Green
ARTENGO Low Sports Socks RS 160 Tri-Pack - Glossy White
ARTENGO Low Sports Socks Tri-Pack RS 160 - White/Off-White/Print
ARTENGO Low Sports Socks Tri-Pack RS 160 - Camo/Taupe/White
ARTENGO RS 160 Low Sports Socks Tri-Pack - Black
ARTENGO RS 160 Low Sports Socks Tri-Pack - Grey
ARTENGO Low Sports Socks RS 160 Tri-Pack - Navy
ARTENGO RS 160 Low Sports Socks Tri-Pack - White
ARTENGO Low Sports Socks RS 160 Tri-Pack - Glossy Black
ARTENGO Low Sports Socks Tri-Pack RS 160 - Off-White/Oatmeal Print
ARTENGO Low Sports Socks RS 160 Tri-Pack - Pink/White/China Blue
ARTENGO Low Sports Socks RS 160 3-Pack - Light Khaki/Black/Khaki
ARTENGO Low Sports Socks RS 160 Tri-Pack - Colour Block/Pink
ARTENGO Low Sports Socks Tri-Pack RS 160 - Beige Print/Brown/Black
ARTENGO Low Sports Socks RS 160 Tri-Pack - Apricot/Pink/Navy
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ARTENGO Low Sports Socks RS 160 Tri-Pack - Orange/Beige/White
Rate: 4.6 stars, 20160 votes
17 colors
£4.99£5.99
VAN RYSEL Cycling Socks 500
VAN RYSEL Cycling Socks 500
VAN RYSEL Cycling Socks 500
VAN RYSEL 500 Cycling Socks - Dark Blue
VAN RYSEL Cycling Socks 500
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VAN RYSEL Cycling Socks 500
Rate: 4.6 stars, 4365 votes
5 colors
£4.99
Was £5.49
QUECHUA Sock Hike 100 High 2-Pack - black
QUECHUA Sock Hike 100 High - Pack of 2 Pairs - Linen and Terracotta
QUECHUA Sock Hike 100 High - Pack of 2 pairs - Grey and Blue
QUECHUA Hike 100 High Socks - Trendy stripes and blue - Pack of 2 pairs
QUECHUA Hike 100 High Socks Limited Edition Pack of 2 Pairs - Khaki and Brown
QUECHUA Sock Hike 100 High - Pack of 2 pairs - Grey and Blue
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QUECHUA Sock Hike 100 High 2-Pack - black
Rate: 4.5 stars, 2682 votes
6 colors
£8.99
QUECHUA Hiking socks - Hike 900 High black - pack of 2 pairs
QUECHUA Hiking Socks Hike 900 High 2-Pack - khaki
QUECHUA Hiking socks - Hike 900 High Blue - Pack of 2 pairs
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QUECHUA Hiking socks - Hike 900 High black - pack of 2 pairs
Rate: 4.5 stars, 2191 votes
3 colors
£24.99
KALENJI Men's breathable briefs - Dark blue
KALENJI Men's breathable briefs - Dark blue
Rate: 4.3 stars, 574 votes
£5.99
VAN RYSEL Cycling Summer Training Base Layer - White/Blue
VAN RYSEL Cycling Summer Training Base Layer
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VAN RYSEL Cycling Summer Training Base Layer - White/Blue
Rate: 4.6 stars, 2704 votes
2 colors
£13.99
QUECHUA Hiking Socks Hike 500 High Trendy x2 Pairs - Purple & Kamo
QUECHUA Hiking socks - Hike 500 High Trendy Kamo x2 pairs
QUECHUA Hiking socks - Hike 500 High x2 pairs Turquoise
QUECHUA Hiking Socks Hike 500 High Trendy Mountain & Kamo x2 Pairs
QUECHUA Hiking socks - Hike 500 High Beige x2 pairs
QUECHUA Hiking socks - Hike 500 High Black x2 pairs
QUECHUA Hiking socks - Hike 500 High Blue x2 pairs
QUECHUA Hiking socks - Hike 500 High Coral x2 pairs
QUECHUA Hiking socks - Hike 500 High Bordeaux x2pairs
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QUECHUA Hiking Socks Hike 500 High Trendy x2 Pairs - Purple & Kamo
Rate: 4.5 stars, 2969 votes
9 colors
£14.99
WEDZE Men’s Thermal Ski Base Layer Top BL 500 - Dark Blue and Grey
WEDZE MEN’S THERMAL SKI BASE LAYER TOP - BL 500 - WHITE
WEDZE MEN’S THERMAL SKI BASE LAYER TOP BL 500 - BLACK
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WEDZE Men’s Thermal Ski Base Layer Top BL 500 - Dark Blue and Grey
Rate: 4.7 stars, 1388 votes
3 colors
£14.99
ARTENGO Low Sports Socks RS 500 Tri-Pack - Blue/White/Pink
ARTENGO Low Tennis Socks RS 500 Tri-Pack - White/Green
ARTENGO Low Sports Socks RS 500 Tri-Pack - White
ARTENGO RS 500 Low Sports Socks Tri-Pack - Black
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ARTENGO Low Sports Socks RS 500 Tri-Pack - Blue/White/Pink
Rate: 4.6 stars, 9390 votes
4 colors
£7.99
KIPRUN RUN900 MID-CALF FINE RUNNING SOCKS - BLUE
KIPRUN RUN900 MID-CALF THIN RUNNING SOCKS
KIPRUN RUNNING MID-CALF FINE SOCKS - RUN 900 BLACK
KIPRUN Run900 Mid-Calf Fine Running Socks - Fluo Yellow
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KIPRUN RUN900 MID-CALF FINE RUNNING SOCKS - BLUE
Rate: 4.5 stars, 678 votes
4 colors
£6.99£9.99
ARTENGO High Tennis Socks RS 500 Tri-Pack - Retro White
ARTENGO High Tennis Socks RS 500 Tri-Pack - Shiny White
ARTENGO High Tennis Socks RS 500 Tri-Pack - White
ARTENGO High Tennis Socks RS 500 Tri-Pack - Grey
ARTENGO High Tennis Socks RS 500 Tri-Pack - Black
ARTENGO High Tennis Socks RS 500 Tri-Pack - Navy
ARTENGO RS800 Adult High Sports Socks 3-pack - Grey
ARTENGO RS 500 Adult High Sports Socks Tri-Pack - Grey
ARTENGO High Tennis Socks RS 500 Tri-Pack - Black/Stripes
ARTENGO High Tennis Socks RS 500 Tri-Pack - Grege
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ARTENGO High Tennis Socks RS 500 Tri-Pack - Retro White
Rate: 4.5 stars, 29201 votes
10 colors
£7.99
QUECHUA Hiking socks - Hike 520 Double High Grey x2 pairs
QUECHUA Hiking socks - Hike 520 Double High Navy x 2 pairs
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QUECHUA Hiking socks - Hike 520 Double High Grey x2 pairs
Rate: 4.3 stars, 2238 votes
2 colors
£17.99
KIPRUN RUNNING MID THICK SOCKS RUN 900 WHITE
KIPRUN RUN900 MID THICK RUNNING SOCKS
KIPRUN RUNNING MID THICK SOCKS - RUN 900 BLACK
KIPRUN RUN900 MID THICK RUNNING SOCKS - YELLOW
KIPRUN RUN900 MID THICK RUNNING SOCKS - BLUE
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KIPRUN RUNNING MID THICK SOCKS RUN 900 WHITE
Rate: 4.6 stars, 3408 votes
5 colors
£7.99
KIPRUN RUN900 THIN INVISIBLE RUNNING SOCKS
KIPRUN RUN900 THIN INVISIBLE RUNNING SOCKS
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KIPRUN RUN900 THIN INVISIBLE RUNNING SOCKS
Rate: 4.5 stars, 1424 votes
2 colors
£6.99
KIPSTA Football Socks Viralto Solo - Pink/Red Stripes
KIPSTA Football Socks Viralto Club - Navy Blue
KIPSTA Football Socks Viralto Club - Orange
KIPSTA Football Socks Viralto Club - Green
KIPSTA Football Socks Viralto Club - Purple
KIPSTA Football Socks Viralto Club - Yellow
KIPSTA Football Socks Viralto Club - Red
KIPSTA Football Socks Viralto Club - White
KIPSTA Football Socks Viralto Club - Blue
KIPSTA Football Socks Viralto Club - Black
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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 - Red
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 - 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, 4396 votes
11 colors
£9.99£17.99
KIPRUN RUN900 MID FINE RUNNING SOCKS
KIPRUN ECO-DESIGN RUN900 MID FINE RUNNING SOCKS - WHITE
KIPRUN RUN900 MID FINE RUNNING SOCKS - YELLOW
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KIPRUN RUN900 MID FINE RUNNING SOCKS
Rate: 4.6 stars, 3169 votes
3 colors
£7.99
QUECHUA Warm Hiking Socks - SH100 MID - 2 Pairs
QUECHUA Warm Hiking Socks - SH100 MID - 2 Pairs
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QUECHUA Warm Hiking Socks - SH100 MID - 2 Pairs
Rate: 4.6 stars, 2746 votes
2 colors
£8.99
WEDZE Ski Socks 100 JQT 23 - Burgundy
WEDZE Ski Socks 100 JQT 23 - Navy
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WEDZE Ski Socks 100 JQT 23 - Burgundy
Rate: 4.7 stars, 480 votes
2 colors
£5.99£8.99
ARTENGO High Sports Socks RS 160 Tri-Pack - Black
ARTENGO High Sports Socks RS 160 Tri-Pack - Navy
ARTENGO High Sports Socks RS 160 Tri-Pack - Grey
ARTENGO High Sports Socks RS 160 Tri-Pack - White
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ARTENGO High Sports Socks RS 160 Tri-Pack - Black
Rate: 4.5 stars, 14541 votes
4 colors
£5.99
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 Football Base Layer Keepdry - Navy Blue
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - Black
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KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - White
Rate: 4.7 stars, 797 votes
5 colors
£14.99
KALENJI Men's long seamless boxer - Dark blue
KALENJI Men's long seamless boxer - Dark blue
£15.99
QUECHUA Warm Hiking Socks SH500 Mid 2 Pairs
QUECHUA Warm Hiking Socks SH500 Mid 2 Pairs
QUECHUA Warm Hiking Socks SH500 Mid 2 Pairs
QUECHUA Warm Hiking Socks SH500 Mid 2 Pairs
QUECHUA Warm Hiking Socks - SH500 ULTRA-WARM MID - 2 Pairs
QUECHUA Warm Hiking Socks SH500 Mid 2 Pairs
QUECHUA Warm Hiking Socks - SH500 ULTRA-WARM MID - 2 Pairs
QUECHUA Warm Hiking Socks - SH500 ULTRA-WARM MID - 2 Pairs
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QUECHUA Warm Hiking Socks SH500 Mid 2 Pairs
Rate: 4.6 stars, 4133 votes
8 colors
£9.99£12.99
KIPRUN RUN900 RUN WILD THICK MIDCALF RUNNING SOCKS - ORANGE
KIPRUN RUN900 RUN WILD THICK MIDCALF RUNNING SOCKS - WHITE BLACK
KIPRUN Run900 Mid-Calf Thick Running Socks - Red/Yellow
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 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 RUN WILD THICK MIDCALF RUNNING SOCKS - ORANGE
Rate: 4.7 stars, 475 votes
12 colors
£7.99£9.99
INESIS Men's Thermal base layer for golf - CW500 navy blue
INESIS Men's Thermal base layer for golf - CW500 black
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INESIS Men's Thermal base layer for golf - CW500 navy blue
Rate: 4.8 stars, 293 votes
2 colors
£19.99
KIPSTA Mid-Rise Grippy Football Socks Viralto MiD II - Blue
KIPSTA Mid-Rise Grippy Football Socks Viralto MiD II - Yellow
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 - Blue
Rate: 4.5 stars, 454 votes
5 colors
£7.99
Was £8.49
DOMYOS Men's Cotton Boxers Tri-Pack - Black/Grey/Blue
DOMYOS Men's Cotton Boxers Tri-Pack - Black/Grey/Blue
£19.99
WEDZE SKI SOCKS 100 - BLUE
WEDZE SKI SOCKS - 100 - BLACK
WEDZE SKI SOCKS - 100 - NEON PINK
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WEDZE SKI SOCKS 100 - BLUE
Rate: 4.6 stars, 722 votes
3 colors
£5.99£8.99
ARTENGO Mid Tennis Socks RS 500 Tri-Pack - Glossy White
ARTENGO Mid-High Tennis Socks RS 500 Tri-Pack - Navy
ARTENGO RS 500 Mid Sports Socks Tri-Pack - Grey
ARTENGO RS 500 Mid Sports Socks Tri-Pack - White
ARTENGO RS 500 Mid Sports Socks Tri-Pack - Black
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ARTENGO Mid Tennis Socks RS 500 Tri-Pack - Glossy White
Rate: 4.5 stars, 11816 votes
5 colors
£7.99
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, 2547 votes
4 colors
£2.99
Was £3.99
QUECHUA Sock Hike 100 Low 2-Pack - grey
QUECHUA Socks Hike 100 Low 2-Pack - black
QUECHUA Hike 100 Low Socks - Light Blue- Pack of 2 pairs
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QUECHUA Sock Hike 100 Low 2-Pack - grey
Rate: 4.6 stars, 1286 votes
3 colors
£5.99
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
QUECHUA Warm hiking socks - SH100 MID JACQUARD - 2 pairs
QUECHUA Warm hiking socks - SH100 MID JACQUARD - 2 pairs
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QUECHUA Warm hiking socks - SH100 MID JACQUARD - 2 pairs
Rate: 4.2 stars, 73 votes
2 colors
£9.99£12.99
KIPRUN RUNNING 500 COMPRESSION SOCKS
KIPRUN RUNNING 500 COMPRESSION SOCKS
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KIPRUN RUNNING 500 COMPRESSION SOCKS
Rate: 4.2 stars, 315 votes
2 colors
£14.99
ARTENGO Low Tennis Socks RS 560 Tri-Pack - White/Black
ARTENGO Low Sports Socks RS 560 3-Pack - Black/Grey
ARTENGO Low Sports Socks RS 560 Tri-Pack - Navy/White
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ARTENGO Low Tennis Socks RS 560 Tri-Pack - White/Black
Rate: 4.7 stars, 782 votes
3 colors
£9.99
FOUGANZA Horse Riding Socks 500 Baby - Turquoise/Green with Designs
FOUGANZA Horse Riding Socks 500 Baby - Turquoise/Green with Designs
Rate: 4.4 stars, 30 votes
£5.99
Was £7.49
4.4/5 based on 201971 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.