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.
45 items
WEDZE Men's ski base layer top - BL 100 - Black
WEDZE Men's ski base layer top - BL 100 - White
Gallery item 1 out of 2
WEDZE Men's ski base layer top - BL 100 - Black
Rate: 4.6 stars, 9528 votes
2 colors
£5.99£7.99
KIPSTA Adult Long-Sleeved Thermal Football Base Layer Top Keepcomfort 100 - Black
KIPSTA Adult Long-Sleeved Base Layer Top Keepcomfort - Black
Gallery item 1 out of 2
KIPSTA Adult Long-Sleeved Thermal Football Base Layer Top Keepcomfort 100 - Black
Rate: 4.6 stars, 1001 votes
2 colors
£9.99
VAN RYSEL Cycling Summer Training Base Layer - White/Blue
VAN RYSEL Cycling Summer Training Base Layer
Gallery item 1 out of 2
VAN RYSEL Cycling Summer Training Base Layer - White/Blue
Rate: 4.6 stars, 2723 votes
2 colors
£13.99
WEDZE Men’s Thermal Ski Base Layer Top BL 500 - Dark Blue and Grey
WEDZE MEN’S THERMAL SKI BASE LAYER TOP BL 500 - BLACK
WEDZE MEN’S THERMAL SKI BASE LAYER TOP - BL 500 - WHITE
Gallery item 1 out of 3
WEDZE Men’s Thermal Ski Base Layer Top BL 500 - Dark Blue and Grey
Rate: 4.7 stars, 1399 votes
3 colors
£14.99
VAN RYSEL Race Short-Sleeved Cycling Base Layer
VAN RYSEL Race Short-Sleeved Cycling Base Layer
Rate: 4.6 stars, 324 votes
£24.99
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 - Navy Blue
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Mottled Grey
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
Gallery item 1 out of 11
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry 500 - Yellow
Rate: 4.7 stars, 4413 votes
11 colors
£9.99£17.99
WEDZE Men's BL 520 thermal base layer roll neck ski top - light grey
WEDZE Men's BL 520 skiing base layer with high turtleneck - Dark blue
Gallery item 1 out of 2
WEDZE Men's BL 520 thermal base layer roll neck ski top - light grey
Rate: 4.7 stars, 263 votes
2 colors
£19.99
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
KIPSTA Short-Sleeved Keepdry - Mottled Grey
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - White
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
Gallery item 1 out of 5
KIPSTA Short-Sleeved Keepdry - Mottled Grey
Rate: 4.7 stars, 813 votes
5 colors
£14.99
SOLOGNAC BASE LAYER FLEECE JACKET 500 BROWN
SOLOGNAC BASE LAYER FLEECE JACKET 500 BROWN
Rate: 4.6 stars, 12 votes
£24.99
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
VAN RYSEL Sleeveless Base Layer Ultralight Race
VAN RYSEL Sleeveless Base Layer Ultralight Race
Rate: 4.5 stars, 850 votes
£19.99
VAN RYSEL Road Cycling Base Layer Training - Khaki
VAN RYSEL Road Cycling Base Layer Training - Black
Gallery item 1 out of 2
VAN RYSEL Road Cycling Base Layer Training - Khaki
Rate: 4.6 stars, 2306 votes
2 colors
£17.99
VAN RYSEL Essential Cycling Base Layer - Black
VAN RYSEL Essential Cycling Base Layer - Black
Rate: 4.5 stars, 631 votes
£9.99
WEDZE Men's thermal ski base layer top - BL 980 seamless Merino wool - Grey
WEDZE Men's thermal ski base layer top - BL 980 seamless Merino wool - Grey
Rate: 4.5 stars, 712 votes
£34.99£54.99
VAN RYSEL Essential Cycling Base Layer - Black
VAN RYSEL Essential Cycling Base Layer - Black
Rate: 4.6 stars, 136 votes
£9.99
TARMAK Men's Slim Fit Basketball Base Layer Jersey UT500 - NBA Los Angeles Lakers
TARMAK Men's Slim Fit Basketball Base Layer Jersey UT500 - NBA New York Knicks
TARMAK Men's Slim Fit Basketball Base Layer Jersey UT500 - NBA Houston Rockets
TARMAK Men's Slim Fit Basketball Base Layer Jersey UT500 - NBA Brooklyn Nets
TARMAK Men's Slim Fit Basketball Base Layer Jersey UT500 - NBA Golden State Warriors
Gallery item 1 out of 5
TARMAK Men's Slim Fit Basketball Base Layer Jersey UT500 - NBA Los Angeles Lakers
Rate: 4.6 stars, 596 votes
5 colors
£8.99£17.99
INOVIK MEN’S THERMAL CROSS-COUNTRY SKI BASE LAYER 900 – BLACK RED
INOVIK MEN'S THERMAL CROSS-COUNTRY SKI BASE LAYER 900 - GREEN
INOVIK MEN’S THERMAL CROSS-COUNTRY SKI BASE LAYER 900 – BLACK
Gallery item 1 out of 3
INOVIK MEN’S THERMAL CROSS-COUNTRY SKI BASE LAYER 900 – BLACK RED
Rate: 4.6 stars, 134 votes
3 colors
£14.99£19.99
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
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, 167 votes
6 colors
£19.99
KIPSTA Adult Base Layer Top Keepwarm 900 - Dark Grey
KIPSTA Adult Base Layer Top Keepwarm 900 - Dark Grey
Rate: 4.7 stars, 517 votes
£29.99
WEDZE Men’s Seamless Ski Base Layer Top BL 980 – Blue/Grey
WEDZE Men’s Seamless Ski Base Layer Top BL 980 – Blue/Grey
Rate: 4.6 stars, 594 votes
£49.99
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry - Aniseed
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry 500 - Black
Gallery item 1 out of 2
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry - Aniseed
Rate: 4.7 stars, 1298 votes
2 colors
£7.99£12.99
HO SOCCER HO Soccer Raven Padded GK Tight Shorts
HO SOCCER HO Soccer Raven Padded GK Tight Shorts
Sold and shipped by Just Keepers Ltd
£30.00
RHINO Mens Sports Base Layer Short Sleeve TShirt (Navy)
RHINO Mens Sports Base Layer Short Sleeve TShirt (White)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Bottle Green)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Purple)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Light Blue)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Red)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Royal)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Green)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Black)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Pink)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Navy Heather)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Black Heather)
RHINO Mens Sports Base Layer Short Sleeve TShirt (Maroon)
Gallery item 1 out of 13
RHINO Mens Sports Base Layer Short Sleeve TShirt (Navy)
13 colors
Sold and shipped by Pertemba GB
From £23.99
TRIBORD MEN'S SAILING BASE LAYER TOP RACE 500 - BLACK
TRIBORD MEN'S SAILING BASE LAYER TOP RACE 500 - BLACK
Rate: 4.3 stars, 23 votes
£27.99
Was £37.99
STANNO Stanno Equip Protection Tights
STANNO Stanno Equip Protection Tights
Sold and shipped by Just Keepers Ltd
£43.00
ONE ONE Impact+ Pro Base Layer Top
ONE ONE Impact+ Pro Base Layer Top
Sold and shipped by Just Keepers Ltd
£40.00
JAKO Jako Turtleneck Winter
JAKO Jako Turtleneck Winter
Sold and shipped by Just Keepers Ltd
From £31.26
KIPSTA Refurbished Adult Long Base Layer Top 500 - A Grade
KIPSTA Refurbished Adult Long Base Layer Top 500 - A Grade
Sold and shipped by Decathlon UK - Second Life
£17.99£19.99
SOLOGNAC BASE LAYER FLEECE JACKET 100 - GREEN
SOLOGNAC BASE LAYER FLEECE JACKET 100 - GREEN
Rate: 4.6 stars, 678 votes
£14.99
TARMAK Men's/Women's Basketball Base Layer Jersey UT500 - NBA Los Angeles Lakers/Purple
TARMAK Men's/Women's Basketball Base Layer Jersey UT500 - NBA Los Angeles Lakers/Black
TARMAK Men's/Women's Basketball Base Layer Jersey UT500 - NBA Chicago Bulls/Red
TARMAK Men's/Women's Basketball Base Layer Jersey UT500 - NBA Boston Celtics/Black
TARMAK Men's/Women's Basketball Base Layer Jersey UT500 - NBA Los Angeles Lakers/White
Gallery item 1 out of 5
TARMAK Men's/Women's Basketball Base Layer Jersey UT500 - NBA Los Angeles Lakers/Purple
Rate: 4.7 stars, 173 votes
5 colors
£16.99£24.99
WEDZE Men's BL 180 thermal base layer seamless ski top - grey
WEDZE Men's BL 180 thermal base layer seamless ski top - grey
Rate: 4.5 stars, 128 votes
£14.99
ODLO Men's PERFORMANCE EVOLUTION WARM thermal ski base layer - OLDO
ODLO Men's PERFORMANCE EVOLUTION WARM thermal ski base layer - OLDO
Rate: 4.9 stars, 9 votes
£54.99
VAN RYSEL 920 Windproof Long-Sleeved Winter Cycling Base Layer
VAN RYSEL 920 Windproof Long-Sleeved Winter Cycling Base Layer
Rate: 4.5 stars, 633 votes
£29.99
WEDZE Men’s Ski Base Layer Top - BL 900 Wool Neck - Navy Blue
WEDZE Men’s Ski Base Layer Top - BL 900 Wool Neck - Navy Blue
Rate: 4.5 stars, 109 votes
£54.99
Out of stock
WEDZE Men's skiing thermal base layer top BL 500 1/2 zip - Dark Grey
WEDZE Men's Ski Base Layer - BL 500 FFS 1/2 Zip Top - Red
WEDZE Men's Ski Base Layer Top - BL 500 1/2 Zip - Red
Gallery item 1 out of 3
WEDZE Men's skiing thermal base layer top BL 500 1/2 zip - Dark Grey
Rate: 4.7 stars, 1343 votes
3 colors
£12.99
Out of stock
WEDZE Men's Ski Base Layer Top - BL 500 - Green
WEDZE Men's Ski Base Layer Top - BL500 - Grey Camo
Gallery item 1 out of 2
WEDZE Men's Ski Base Layer Top - BL 500 - Green
Rate: 4.7 stars, 5141 votes
2 colors
£9.99
Out of stock
WEDZE Men's Ski Base Layer Top - White
WEDZE Men's Ski Base Layer Top - White
Rate: 4.5 stars, 10833 votes
£4.99
Out of stock
WEDZE Freshwarm Men's Ski Base Layer - Blue
WEDZE Freshwarm Men's Ski Base Layer - Yellow
Gallery item 1 out of 2
WEDZE Freshwarm Men's Ski Base Layer - Blue
Rate: 4.6 stars, 2155 votes
2 colors
£7.99
Out of stock
4.6/5 based on 65878 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.