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.
892 items
SOLOGNAC BASE LAYER FLEECE TROUSERS 500 BROWN
SOLOGNAC BASE LAYER FLEECE TROUSERS 500 BROWN
Rate: 4.3 stars, 27 votes
£24.99
WEDZE Men’s Ski Base Layer Bottoms - BL 500 - Black
WEDZE Men’s Ski Base Layer Bottoms - BL 500 - Black
Rate: 4.7 stars, 548 votes
£14.99
SEALSKINZ Sealskinz Waterproof Cold Weather Mid-Length Socks
SEALSKINZ Sealskinz Waterproof Cold Weather Mid-Length Socks
£39.99
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
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
Gallery item 1 out of 5
KIPRUN RUNNING MID THICK SOCKS RUN 900 WHITE
Rate: 4.6 stars, 3422 votes
5 colors
£7.99
KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS
KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS
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KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS
Rate: 4.5 stars, 49 votes
2 colors
£4.99
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 - White
KIPSTA Adult Short-Sleeved Football Base Layer Keepdry - Navy Blue
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - Black
Gallery item 1 out of 5
KIPSTA Short-Sleeved Keepdry - Mottled Grey
Rate: 4.7 stars, 813 votes
5 colors
£14.99
ARTENGO High Sports Socks RS 160 Tri-Pack - White
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
Gallery item 1 out of 4
ARTENGO High Sports Socks RS 160 Tri-Pack - White
Rate: 4.5 stars, 14597 votes
4 colors
£5.99
KIPSTA Short Grippy Football Socks Viralto MiD - Red
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 - Black
KIPSTA Short Grippy Football Socks Viralto MiD - White
Gallery item 1 out of 5
KIPSTA Short Grippy Football Socks Viralto MiD - Red
Rate: 4.5 stars, 458 votes
5 colors
£7.99
Was £8.49
VAN RYSEL Road Cycling Replica Socks Decathlon–AG2R La Mondiale Team
VAN RYSEL Road Cycling Replica Socks Decathlon–AG2R La Mondiale Team
£9.99
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
Gallery item 1 out of 3
ARTENGO Low Tennis Socks RS 100 Tri-Pack - Black
Rate: 4.6 stars, 5872 votes
3 colors
£4.49
WEDZE Ski Socks 100 JQT 23 - Navy
WEDZE Ski Socks 100 JQT 23 - Navy
Rate: 4.7 stars, 480 votes
£5.99£8.99
ARTENGO RS 560 Mid Sport Socks Tri-Pack - White/Grey
ARTENGO Mid Sports Socks Tri-Pack RS 560 - Black/Grey
Gallery item 1 out of 2
ARTENGO RS 560 Mid Sport Socks Tri-Pack - White/Grey
Rate: 4.6 stars, 2235 votes
2 colors
£9.99
ADIDAS High Sports Socks Tri-Pack - Black
ADIDAS High Sports Socks Tri-Pack - Black
Rate: 4.6 stars, 328 votes
£9.99
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
ARTENGO Low Tennis Socks RS 500 Tri-Pack - White/Green
Gallery item 1 out of 4
ARTENGO Low Sports Socks RS 500 Tri-Pack - Blue/White/Pink
Rate: 4.6 stars, 9408 votes
4 colors
£7.99
NEWFEEL Fitness/Nordic Walking Socks WS 100 Invisible 3-Pack - white
NEWFEEL Fitness/Nordic Walking Socks WS 100 Invisible 3-Pack - white
Rate: 4.2 stars, 832 votes
£6.49
VAN RYSEL Long-Sleeved Cycling Base Layer Racer - Carbon Grey
VAN RYSEL Long-Sleeved Cycling Base Layer Racer - Cosmos Blue
Gallery item 1 out of 2
VAN RYSEL Long-Sleeved Cycling Base Layer Racer - Carbon Grey
Rate: 4.6 stars, 383 votes
2 colors
£29.99
ARTENGO RS 160 Mid Sport Socks Tri-Pack - Dark Grey
ARTENGO Mid Sports Socks Tri-Pack RS 160 - Black
ARTENGO Mid Sports Socks Tri-Pack RS 160 - Khaki/Khaki/Black
ARTENGO RS 160 Adult Mid-High Sports Socks Tri-Pack - White
ARTENGO Mid Sports Socks RS 160 Tri-Pack - Purple and White Patterns
Gallery item 1 out of 5
ARTENGO RS 160 Mid Sport Socks Tri-Pack - Dark Grey
Rate: 4.6 stars, 10776 votes
5 colors
£5.99
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
Gallery item 1 out of 4
KIPRUN RUN900 MID-CALF FINE RUNNING SOCKS - BLUE
Rate: 4.5 stars, 684 votes
4 colors
£6.99£9.99
SOLOGNAC Hunting Socks Pack ACT 100 x2 pairs
SOLOGNAC Hunting Socks Pack ACT 100 x2 pairs
Rate: 4.7 stars, 1056 votes
£5.49
DOMYOS Men's Cotton Boxers Tri-Pack - Black/Grey/Blue
DOMYOS Men's Cotton Boxers Tri-Pack - Black/Grey/Blue
£14.99
Was £19.99
KIPRUN Running Socks Run 100 3-Pack - black
KIPRUN Running Socks Run 100 3-Pack - white
Gallery item 1 out of 2
KIPRUN Running Socks Run 100 3-Pack - black
Rate: 4.5 stars, 29600 votes
2 colors
£3.99£4.49
KIPRUN RUN900 THIN INVISIBLE RUNNING SOCKS
KIPRUN RUN900 THIN INVISIBLE RUNNING SOCKS
Gallery item 1 out of 2
KIPRUN RUN900 THIN INVISIBLE RUNNING SOCKS
Rate: 4.5 stars, 1426 votes
2 colors
£6.99
WEDZE SKI SOCKS 100 - BLUE
WEDZE SKI SOCKS - 100 - BLACK
WEDZE SKI SOCKS - 100 - NEON PINK
Gallery item 1 out of 3
WEDZE SKI SOCKS 100 - BLUE
Rate: 4.6 stars, 734 votes
3 colors
£5.99£8.99
FOUGANZA Adult Horse Riding Socks 500 Twin-Pack - Lavender Purple/Navy Graphic Designs
FOUGANZA Adult Horse Riding Socks 500 - Blue/Black/Brown GraphPack of 2
FOUGANZA Adult Horse Riding Socks 500 - Blue/Black/Larch Green GraphPack of 2
FOUGANZA Adult Horse Riding Socks 500 - Burgundy/Black GraphPack of 2
FOUGANZA Adult Horse Riding Socks 500 - Grey/Black GraphPack of 2
FOUGANZA Adult Horse Riding Socks 500 - Blue/Black/Green GraphPack of 2
FOUGANZA Adult Horse Riding Socks 500 - Black/Grey/Pink PatternsPack of 2
Gallery item 1 out of 7
FOUGANZA Adult Horse Riding Socks 500 Twin-Pack - Lavender Purple/Navy Graphic Designs
7 colors
£8.49
ARTENGO RS 500 Mid Sports Socks Tri-Pack - Grey
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 - Black
ARTENGO Mid Tennis Socks RS 500 Tri-Pack - Glossy White
Gallery item 1 out of 5
ARTENGO RS 500 Mid Sports Socks Tri-Pack - Grey
Rate: 4.5 stars, 11852 votes
5 colors
£7.99
OFFLOAD Adult Knee-Length Rugby Socks R500 - Red
OFFLOAD Adult Knee-Length Rugby Socks R500 - Black
OFFLOAD Knee-Length Rugby Socks R500 - Blue
Gallery item 1 out of 3
OFFLOAD Adult Knee-Length Rugby Socks R500 - Red
Rate: 4.6 stars, 232 votes
3 colors
£5.99
SIMOND Mountaineering Socks - Alpinism Black
SIMOND Mountaineering Socks - Alpinism Black
Rate: 4.5 stars, 290 votes
£14.99
ARTENGO Low Tennis Socks RS 560 Tri-Pack - White/Black
ARTENGO Low Sports Socks RS 560 Tri-Pack - Navy/White
ARTENGO Low Sports Socks RS 560 3-Pack - Black/Grey
Gallery item 1 out of 3
ARTENGO Low Tennis Socks RS 560 Tri-Pack - White/Black
Rate: 4.7 stars, 782 votes
3 colors
£9.99
KIPRUN RUN900 THICK STRAP RUNNING SOCKS - BLACK
KIPRUN RUNNING THICK STRAP SOCKS - BLACK
KIPRUN Running Thick Socks Run 900 Strap - blue
Gallery item 1 out of 3
KIPRUN RUN900 THICK STRAP RUNNING SOCKS - BLACK
Rate: 4.4 stars, 5142 votes
3 colors
£9.99
FORCLAZ Men's MT500 mountain trekking Merino wool boxer shorts
FORCLAZ Men's MT500 mountain trekking Merino wool boxer shorts
Rate: 4.8 stars, 11 votes
£17.99
VAN RYSEL 900 Winter Cycling Socks
VAN RYSEL 900 Winter Cycling Socks
Gallery item 1 out of 2
VAN RYSEL 900 Winter Cycling Socks
Rate: 4.4 stars, 468 votes
2 colors
£12.99
QUECHUA Warm Hiking Socks - SH500 MOUNTAIN MID - 2 Pairs
QUECHUA Warm Hiking Socks - SH500 MOUNTAIN MID - 2 Pairs
Gallery item 1 out of 2
QUECHUA Warm Hiking Socks - SH500 MOUNTAIN MID - 2 Pairs
Rate: 4.4 stars, 2637 votes
2 colors
£14.99
WEDZE Men’s Seamless Ski Base Layer I-Soft Top - BL 580 - Black/Blue
WEDZE Men’s Seamless Ski Base Layer I-Soft Top - BL 580 - Black/Blue
Rate: 4.6 stars, 1273 votes
£17.99£27.99
KIPRUN RUNNING 500 COMPRESSION SOCKS
KIPRUN RUNNING 500 COMPRESSION SOCKS
Gallery item 1 out of 2
KIPRUN RUNNING 500 COMPRESSION SOCKS
Rate: 4.2 stars, 316 votes
2 colors
£14.99
OFFLOAD Men's Long-Sleeved Rugby Base Layer Top R500 - Black
OFFLOAD Men's Long-Sleeved Rugby Base Layer Top R500 - Black
Rate: 4.9 stars, 26 votes
£14.99
SHIMANO Overshoes Dual Rain
SHIMANO Overshoes Dual Rain
Rate: 4.0 stars, 1 votes
£29.99£39.99
SOLOGNAC BASE LAYER FLEECE JACKET 500 BROWN
SOLOGNAC BASE LAYER FLEECE JACKET 500 BROWN
Rate: 4.6 stars, 12 votes
£24.99
KIPSTA Adult Football Socks Essential - White
KIPSTA Adult Football Socks Essential - Blue
KIPSTA Adult Football Socks Essential Club - Red
KIPSTA Adult Football Socks Essential Club - Black
Gallery item 1 out of 4
KIPSTA Adult Football Socks Essential - White
Rate: 4.3 stars, 2557 votes
4 colors
£2.99
Was £3.99
GUNN AND MOORE GM Cricket Batting Boxer Short Adult
GUNN AND MOORE GM Cricket Batting Boxer Short Adult
Rate: 5.0 stars, 1 votes
£11.99
4.5/5 based on 439762 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.