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.
947 items
WEDZE Men's ski base layer top - BL 100 - Black
WEDZE Men's ski base layer top - BL 100 - White
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WEDZE Men's ski base layer top - BL 100 - Black
Rate: 4.6 stars, 9466 votes
2 colors
£5.99£7.99
KIPRUN PACK OF 2 PAIRS OF RUN500 FINE CREW RUNNING SOCKS
KIPRUN PACK OF 2 PAIRS OF RUN500 FINE CREW RUNNING SOCKS
Rate: 4.8 stars, 48 votes
£5.99
KALENJI Men's breathable microfibre boxers - Black
KALENJI Men's Breathable microfibre boxers - Olive
KALENJI Men's Breathable microfibre boxers - Bronze
KALENJI Men's breathable microfibre boxers - Black
KALENJI Men's Breathable microfibre boxers - Earth
KALENJI Men's breathable microfibre boxers - Taupe pink
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KALENJI Men's breathable microfibre boxers - Black
Rate: 4.5 stars, 24595 votes
6 colors
£5.99
QUECHUA Sock Hike 50 High - Pack of 2 pairs - Grey
QUECHUA Sock Hike 50 High - Pack of 2 pairs - Grey
Rate: 4.5 stars, 1586 votes
£5.99
WEDZE M Ski Thermal Base Layer Bottoms - BL 100 - Black
WEDZE M Ski Thermal Base Layer Bottoms - BL 100 - Black
Rate: 4.6 stars, 4492 votes
£5.99£7.99
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
KIPSTA Adult Long-Sleeved Thermal Football Base Layer Top Keepcomfort 100 - Black
KIPSTA Adult Long-Sleeved Base Layer Top Keepcomfort - Black
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KIPSTA Adult Long-Sleeved Thermal Football Base Layer Top Keepcomfort 100 - Black
Rate: 4.6 stars, 989 votes
2 colors
£9.99
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
KIPSTA Adult Football Undershorts Keepcomfort - Black
KIPSTA Adult Football Undershorts Keepcomfort - White
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KIPSTA Adult Football Undershorts Keepcomfort - Black
Rate: 4.6 stars, 353 votes
2 colors
£7.99
Was £9.99
QUECHUA Hiking Socks Hike 500 Mid x2 Pairs - Grey and Red
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 Black x2 pairs
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QUECHUA Hiking Socks Hike 500 Mid x2 Pairs - Grey and Red
Rate: 4.6 stars, 2725 votes
4 colors
£12.99
WEDZE ADULT SKI AND SNOWBOARD SOCKS - 50 - BLACK
WEDZE ADULT SKI AND SNOWBOARD SOCKS - 50 - BLACK
Rate: 4.5 stars, 2130 votes
£3.99£4.99
ARTENGO Low Sports Socks RS 160 Tri-Pack - Orange/Beige/White
ARTENGO Low Sports Socks RS 160 Tri-Pack - Navy
ARTENGO Low Sports Socks RS 160 Tri-Pack - Sky Blue/White/Pink
ARTENGO Low Sports Socks RS 160 Tri-Pack - Glossy White
ARTENGO Low Sports Socks RS 160 Tri-Pack - Glossy Black
ARTENGO Low Sports Socks Tri-Pack RS 160 - White/Off-White/Print
ARTENGO Low Tennis Socks RS 160 Tri-Pack - Green/White/Green
ARTENGO Low Sports Socks Tri-Pack RS 160 - Off-White/Oatmeal Print
ARTENGO RS 160 Low Sports Socks Tri-Pack - White
ARTENGO RS 160 Low Sports Socks Tri-Pack - Grey
ARTENGO Low Sports Socks RS 160 Tri-Pack - Pink/White/China Blue
ARTENGO RS 160 Low Sports Socks Tri-Pack - Black
ARTENGO Low Sports Socks Tri-Pack RS 160 - Beige Print/Brown/Black
ARTENGO Low Sports Socks Tri-Pack RS 160 - Camo/Taupe/White
ARTENGO Low Sports Socks RS 160 Tri-Pack - Apricot/Pink/Navy
ARTENGO Low Sports Socks RS 160 3-Pack - Light Khaki/Black/Khaki
ARTENGO Low Sports Socks RS 160 Tri-Pack - Colour Block/Pink
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ARTENGO Low Sports Socks RS 160 Tri-Pack - Orange/Beige/White
Rate: 4.6 stars, 20138 votes
17 colors
£4.99£5.99
KIPRUN PACK OF 2 PAIRS OF RUN500 THICK MID-CALF RUNNING SOCKS
KIPRUN PACK OF 2 PAIRS OF RUN500 THICK MID-CALF RUNNING SOCKS
£6.99
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, 763 votes
6 colors
£8.99
Was £9.99
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
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
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QUECHUA Hike 100 High Socks - Trendy stripes and blue - Pack of 2 pairs
Rate: 4.5 stars, 2677 votes
6 colors
£8.99
VAN RYSEL Cycling Socks 500
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, 4364 votes
6 colors
£4.99
Was £5.49
QUECHUA Socks Hike 100 Mid 2-Pack - black
QUECHUA Hike 100 Mid Socks - Pink and Grey- Pack of 2
QUECHUA Hike 100 Mid Socks – Brown and Grey – Pack of 2 pairs
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QUECHUA Socks Hike 100 Mid 2-Pack - black
Rate: 4.6 stars, 1448 votes
3 colors
£6.99
KALENJI Men's breathable briefs - Dark blue
KALENJI Men's breathable briefs - Dark blue
Rate: 4.3 stars, 572 votes
£5.99
QUECHUA Hiking socks - Hike 900 High Blue - Pack of 2 pairs
QUECHUA Hiking socks - Hike 900 High black - pack of 2 pairs
QUECHUA Hiking Socks Hike 900 High 2-Pack - khaki
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QUECHUA Hiking socks - Hike 900 High Blue - Pack of 2 pairs
Rate: 4.5 stars, 2189 votes
3 colors
£24.99
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, 2702 votes
2 colors
£13.99
ARTENGO Mid Tennis Socks RS 500 Tri-Pack - Glossy White
ARTENGO RS 500 Mid Sports Socks Tri-Pack - Black
ARTENGO Mid-High Tennis Socks RS 500 Tri-Pack - Navy
ARTENGO RS 500 Mid Sports Socks Tri-Pack - White
ARTENGO RS 500 Mid Sports Socks Tri-Pack - Grey
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ARTENGO Mid Tennis Socks RS 500 Tri-Pack - Glossy White
Rate: 4.5 stars, 11808 votes
5 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, 676 votes
4 colors
£6.99£9.99
WEDZE MEN’S THERMAL SKI BASE LAYER TOP - BL 500 - WHITE
WEDZE Men’s Thermal Ski Base Layer Top BL 500 - Dark Blue and Grey
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 - WHITE
Rate: 4.7 stars, 1387 votes
3 colors
£14.99
ARTENGO Low Tennis Socks RS 500 Tri-Pack - White/Green
ARTENGO Low Sports Socks RS 500 Tri-Pack - Blue/White/Pink
ARTENGO RS 500 Low Sports Socks Tri-Pack - Black
ARTENGO Low Sports Socks RS 500 Tri-Pack - White
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ARTENGO Low Tennis Socks RS 500 Tri-Pack - White/Green
Rate: 4.6 stars, 9386 votes
4 colors
£7.99
KIPRUN RUNNING MID THICK SOCKS RUN 900 WHITE
KIPRUN RUNNING MID THICK SOCKS - RUN 900 BLACK
KIPRUN RUN900 MID THICK RUNNING SOCKS
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, 3406 votes
5 colors
£7.99
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, 3164 votes
3 colors
£7.99
WEDZE SKI SOCKS 100 - BLUE
WEDZE SKI SOCKS - 100 - NEON PINK
WEDZE SKI SOCKS - 100 - BLACK
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WEDZE SKI SOCKS 100 - BLUE
Rate: 4.6 stars, 719 votes
3 colors
£5.99£8.99
ARTENGO High Tennis Socks RS 500 Tri-Pack - Shiny White
ARTENGO High Tennis Socks RS 500 Tri-Pack - Black
ARTENGO High Tennis Socks RS 500 Tri-Pack - White
ARTENGO High Tennis Socks RS 500 Tri-Pack - Navy
ARTENGO High Tennis Socks RS 500 Tri-Pack - Grey
ARTENGO High Tennis Socks RS 500 Tri-Pack - Retro White
ARTENGO RS800 Adult High Sports Socks 3-pack - Grey
ARTENGO High Tennis Socks RS 500 Tri-Pack - Grege
ARTENGO High Tennis Socks RS 500 Tri-Pack - Black/Stripes
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ARTENGO High Tennis Socks RS 500 Tri-Pack - Shiny White
Rate: 4.5 stars, 29187 votes
9 colors
£7.99
WEDZE Men’s Ski Base Layer Bottoms - BL 500 - Black
WEDZE Men’s Ski Base Layer Bottoms - BL 500 - Black
Rate: 4.7 stars, 542 votes
£14.99
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, 1423 votes
2 colors
£6.99
QUECHUA Hiking socks - Hike 520 Double High Navy x 2 pairs
QUECHUA Hiking socks - Hike 520 Double High Grey x2 pairs
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QUECHUA Hiking socks - Hike 520 Double High Navy x 2 pairs
Rate: 4.3 stars, 2235 votes
2 colors
£17.99
ARTENGO Low Tennis Socks RS 100 Tri-Pack - Black
ARTENGO Low Tennis Socks RS 100 Tri-Pack - White
ARTENGO Low Tennis Socks RS 100 Tri-Pack - White
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ARTENGO Low Tennis Socks RS 100 Tri-Pack - Black
Rate: 4.6 stars, 5844 votes
3 colors
£4.49
DOMYOS Women's Non-Slip Fitness Socks 500 - Black
DOMYOS Women's Non-Slip Fitness Socks 500 - Grey
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DOMYOS Women's Non-Slip Fitness Socks 500 - Black
Rate: 4.5 stars, 2108 votes
2 colors
£5.99
Was £6.99
VAN RYSEL Road Cycling Socks 900 Aero
VAN RYSEL Road Cycling Socks 900 Aero
Rate: 4.5 stars, 83 votes
£19.99
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, 2744 votes
2 colors
£8.99
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - White
KIPSTA Adult Short-Sleeved Football Base Layer Keepdry - Navy Blue
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - Black
KIPSTA Short-Sleeved Keepdry - Mottled Grey
KIPSTA Adult Short-Sleeved Football Base Layer Keepdry - Red
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KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - White
Rate: 4.7 stars, 794 votes
5 colors
£14.99
QUECHUA Hiking socks - Hike 500 High Trendy Kamo x2 pairs
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 x2 pairs Turquoise
QUECHUA Hiking socks - Hike 500 High Black x2 pairs
QUECHUA Hiking Socks Hike 500 High Trendy x2 Pairs - Purple & Kamo
QUECHUA Hiking socks - Hike 500 High Blue x2 pairs
QUECHUA Hiking socks - Hike 500 High Bordeaux x2pairs
QUECHUA Hiking socks - Hike 500 High Coral x2 pairs
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QUECHUA Hiking socks - Hike 500 High Trendy Kamo x2 pairs
Rate: 4.5 stars, 2962 votes
9 colors
£14.99
VAN RYSEL Race Short-Sleeved Cycling Base Layer
VAN RYSEL Race Short-Sleeved Cycling Base Layer
Rate: 4.6 stars, 321 votes
£24.99
KIPSTA Football Socks Viralto Solo - Pink/Red Stripes
KIPSTA Football Socks Viralto Club - Navy Blue
KIPSTA Football Socks Viralto Club - Yellow
KIPSTA Football Socks Viralto Club - Purple
KIPSTA Football Socks Viralto Club - Green
KIPSTA Football Socks Viralto Club - White
KIPSTA Football Socks Viralto Club - Orange
KIPSTA Football Socks Viralto Club - Black
KIPSTA Football Socks Viralto Club - Blue
KIPSTA Football Socks Viralto Club - Red
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KIPSTA Football Socks Viralto Solo - Pink/Red Stripes
Rate: 4.5 stars, 3697 votes
10 colors
£5.99
ARTENGO High Sports Socks RS 900 Tri-Pack - Black/Grey
ARTENGO High Sports Socks RS 900 Tri-Pack - White
Gallery item 1 out of 2
ARTENGO High Sports Socks RS 900 Tri-Pack - Black/Grey
Rate: 4.5 stars, 3534 votes
2 colors
£11.99
4.5/5 based on 434643 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.