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.
928 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, 9476 votes
2 colors
£5.99£7.99
KALENJI Men's Breathable microfibre boxers - Olive
KALENJI Men's breathable microfibre boxers - Black
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 - Olive
Rate: 4.5 stars, 24604 votes
6 colors
£5.99
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, 49 votes
£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, 1588 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, 4496 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
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 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, 990 votes
2 colors
£9.99
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, 769 votes
6 colors
£8.99
Was £9.99
QUECHUA Hiking Socks Hike 500 Mid 2-Pack - grey yellow
QUECHUA Hiking socks - Hike 500 Mid Black x2 pairs
QUECHUA Hiking Socks Hike 500 Mid x2 Pairs - Grey and Red
QUECHUA Hiking socks - Hike 500 Mid x2 pairs Mint Green
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QUECHUA Hiking Socks Hike 500 Mid 2-Pack - grey yellow
Rate: 4.6 stars, 2726 votes
4 colors
£12.99
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
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
ARTENGO Low Sports Socks RS 160 Tri-Pack - Orange/Beige/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 Tennis Socks RS 160 Tri-Pack - Green/White/Green
ARTENGO Low Sports Socks RS 160 Tri-Pack - Sky Blue/White/Pink
ARTENGO Low Sports Socks Tri-Pack RS 160 - White/Off-White/Print
ARTENGO RS 160 Low Sports Socks Tri-Pack - Black
ARTENGO RS 160 Low Sports Socks Tri-Pack - White
ARTENGO Low Sports Socks RS 160 Tri-Pack - Glossy White
ARTENGO RS 160 Low Sports Socks Tri-Pack - Grey
ARTENGO Low Sports Socks RS 160 Tri-Pack - Pink/White/China Blue
ARTENGO Low Sports Socks RS 160 Tri-Pack - Navy
ARTENGO Low Sports Socks Tri-Pack RS 160 - Beige Print/Brown/Black
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 - Camo/Taupe/White
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, 20161 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 RoadR 500 Cycling Socks - Navy
VAN RYSEL RoadR 500 Cycling Socks - Black
VAN RYSEL Cycling Socks 500
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VAN RYSEL Cycling Socks 500
Rate: 4.6 stars, 4365 votes
7 colors
£4.99
Was £5.49
QUECHUA Sock Hike 100 High 2-Pack - black
QUECHUA Hike 100 High Socks Limited Edition Pack of 2 Pairs - Khaki and Brown
QUECHUA Hike 100 High Socks - Trendy stripes and blue - Pack of 2 pairs
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 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
WEDZE ADULT SKI AND SNOWBOARD SOCKS - 50 - BLACK
WEDZE ADULT SKI AND SNOWBOARD SOCKS - 50 - BLACK
Rate: 4.5 stars, 2131 votes
£3.99£4.99
QUECHUA Hiking Socks Hike 900 High 2-Pack - khaki
QUECHUA Hiking socks - Hike 900 High black - pack of 2 pairs
QUECHUA Hiking socks - Hike 900 High Blue - Pack of 2 pairs
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QUECHUA Hiking Socks Hike 900 High 2-Pack - khaki
Rate: 4.5 stars, 2192 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, 2705 votes
2 colors
£13.99
QUECHUA Hiking Socks Hike 500 High Trendy Mountain & Kamo x2 Pairs
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 Blue 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 Bordeaux x2pairs
QUECHUA Hiking socks - Hike 500 High Coral x2 pairs
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QUECHUA Hiking Socks Hike 500 High Trendy Mountain & Kamo x2 Pairs
Rate: 4.5 stars, 2969 votes
9 colors
£14.99
QUECHUA Hike 100 Mid Socks – Brown and Grey – Pack of 2 pairs
QUECHUA Socks Hike 100 Mid 2-Pack - black
QUECHUA Hike 100 Mid Socks - Pink and Grey- Pack of 2
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QUECHUA Hike 100 Mid Socks – Brown and Grey – Pack of 2 pairs
Rate: 4.6 stars, 1451 votes
3 colors
£6.99
VAN RYSEL Race Short-Sleeved Cycling Base Layer
VAN RYSEL Race Short-Sleeved Cycling Base Layer
Rate: 4.6 stars, 321 votes
£24.99
VAN RYSEL Road Cycling Socks 900 Aero
VAN RYSEL Road Cycling Socks 900 Aero
Rate: 4.5 stars, 83 votes
£19.99
WEDZE MEN’S THERMAL SKI BASE LAYER TOP - BL 500 - WHITE
WEDZE MEN’S THERMAL SKI BASE LAYER TOP BL 500 - BLACK
WEDZE Men’s Thermal Ski Base Layer Top BL 500 - Dark Blue and Grey
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WEDZE MEN’S THERMAL SKI BASE LAYER TOP - BL 500 - WHITE
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 RS 500 Low Sports Socks Tri-Pack - Black
ARTENGO Low Sports Socks RS 500 Tri-Pack - White
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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 RUNNING MID-CALF FINE SOCKS - RUN 900 BLACK
KIPRUN RUN900 MID-CALF THIN RUNNING SOCKS
KIPRUN Run900 Mid-Calf Fine Running Socks - Fluo Yellow
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KIPRUN RUN900 MID-CALF FINE RUNNING SOCKS - BLUE
4 colors
£6.99£9.99
ARTENGO High Tennis Socks RS 500 Tri-Pack - Navy
ARTENGO High Tennis Socks RS 500 Tri-Pack - Shiny White
ARTENGO High Tennis Socks RS 500 Tri-Pack - Retro White
ARTENGO High Tennis Socks RS 500 Tri-Pack - White
ARTENGO High Tennis Socks RS 500 Tri-Pack - Black
ARTENGO High Tennis Socks RS 500 Tri-Pack - Grey
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 - Grege
ARTENGO High Tennis Socks RS 500 Tri-Pack - Black/Stripes
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ARTENGO High Tennis Socks RS 500 Tri-Pack - Navy
Rate: 4.5 stars, 29205 votes
10 colors
£7.99
KIPRUN RUN900 5-TOE RUNNING SOCKS
KIPRUN RUN900 5-TOE RUNNING SOCKS
Rate: 4.3 stars, 1356 votes
£9.99
QUECHUA Hiking socks - Hike 520 Double High Grey x2 pairs
QUECHUA Hiking socks - Hike 520 Double High Navy x 2 pairs
Gallery item 1 out of 2
QUECHUA Hiking socks - Hike 520 Double High Grey x2 pairs
Rate: 4.3 stars, 2238 votes
2 colors
£17.99
KIPRUN RUN900 MID THICK RUNNING SOCKS
KIPRUN RUNNING MID THICK SOCKS - RUN 900 BLACK
KIPRUN RUNNING MID THICK SOCKS RUN 900 WHITE
KIPRUN RUN900 MID THICK RUNNING SOCKS - YELLOW
KIPRUN RUN900 MID THICK RUNNING SOCKS - BLUE
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KIPRUN RUN900 MID THICK RUNNING SOCKS
Rate: 4.6 stars, 3409 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
DOMYOS Women's Non-Slip Fitness Socks 500 - Black
DOMYOS Women's Non-Slip Fitness Socks 500 - Grey
Gallery item 1 out of 2
DOMYOS Women's Non-Slip Fitness Socks 500 - Black
Rate: 4.5 stars, 2111 votes
2 colors
£5.99
Was £6.99
KIPSTA Football Socks Viralto Solo - Pink/Red Stripes
KIPSTA Football Socks Viralto Club - Orange
KIPSTA Football Socks Viralto Club - Green
KIPSTA Football Socks Viralto Club - Navy Blue
KIPSTA Football Socks Viralto Club - Red
KIPSTA Football Socks Viralto Club - Blue
KIPSTA Football Socks Viralto Club - Yellow
KIPSTA Football Socks Viralto Club - White
KIPSTA Football Socks Viralto Club - Black
KIPSTA Football Socks Viralto Club - Purple
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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 - Indigo Blue
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Navy Blue
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Black
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Mottled Grey
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
ARTENGO High Sports Socks RS 900 Tri-Pack - White
ARTENGO High Sports Socks RS 900 Tri-Pack - Black/Grey
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ARTENGO High Sports Socks RS 900 Tri-Pack - White
Rate: 4.5 stars, 3535 votes
2 colors
£11.99
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
ARTENGO Low Tennis Socks RS 100 Tri-Pack - White
ARTENGO Low Tennis Socks RS 100 Tri-Pack - Black
ARTENGO Low Tennis Socks RS 100 Tri-Pack - White
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ARTENGO Low Tennis Socks RS 100 Tri-Pack - White
Rate: 4.6 stars, 5850 votes
3 colors
£4.49
VAN RYSEL Cycling Socks 900
VAN RYSEL Cycling Socks 900
VAN RYSEL Cycling Socks 900 Ltd Edition
VAN RYSEL Cycling Socks 900 "No Mud Enough"
Gallery item 1 out of 4
VAN RYSEL Cycling Socks 900
4 colors
£8.49
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
QUECHUA Warm Hiking Socks - SH100 MID - 2 Pairs
QUECHUA Warm Hiking Socks - SH100 MID - 2 Pairs
Gallery item 1 out of 2
QUECHUA Warm Hiking Socks - SH100 MID - 2 Pairs
Rate: 4.6 stars, 2748 votes
2 colors
£8.99
4.5/5 based on 436096 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.