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.
2,828 items
WEDZE Men's Warm, Comfortable Thermal Skiing Base Layer 100 - Black

WEDZE Men's Warm, Comfortable Thermal Skiing Base Layer 100 - Black

Rate: 4.6 stars, 11359 votes
2 colours
£6.99
WEDZE M Ski Thermal Base Layer Bottoms - BL 100 - Black

WEDZE M Ski Thermal Base Layer Bottoms - BL 100 - Black

Rate: 4.6 stars, 5793 votes
£6.99
New lower price
WEDZE Adult Ski and Snowboard Socks 100 Plus - Black and Grey

WEDZE Adult Ski and Snowboard Socks 100 Plus - Black and Grey

Rate: 4.6 stars, 1089 votes
6 colours
£7.99
Was £8.99
New lower price
WEDZE ADULT SKI AND SNOWBOARD SOCKS - 100 - GREY

WEDZE ADULT SKI AND SNOWBOARD SOCKS - 100 - GREY

Rate: 4.6 stars, 2683 votes
£3.99
Was £4.99
WEDZE Men’s Ski Base Layer Bottoms - BL 500 - Black

WEDZE Men’s Ski Base Layer Bottoms - BL 500 - Black

Rate: 4.8 stars, 1276 votes
£14.99
WEDZE Adult Merino Wool Ski Socks 500 - Black and Yellow

WEDZE Adult Merino Wool Ski Socks 500 - Black and Yellow

Rate: 4.8 stars, 28 votes
5 colours
£11.99
WEDZE Men’s Warm and Breathable Ski Base Layer Top, BL500 - Black

WEDZE Men’s Warm and Breathable Ski Base Layer Top, BL500 - Black

Rate: 4.8 stars, 2600 votes
5 colours
£14.99
KIPSTA Adult Long-Sleeved Thermal Football Base Layer Top Keepcomfort 100 - Black

KIPSTA Adult Long-Sleeved Thermal Football Base Layer Top Keepcomfort 100 - Black

Rate: 4.7 stars, 1581 votes
2 colours
£9.99
WEDZE Adult Merino Wool Ski Socks 500 - Lilac

WEDZE Adult Merino Wool Ski Socks 500 - Lilac

Rate: 4.8 stars, 28 votes
5 colours
£11.99
WEDZE Adult Merino Wool Ski Socks 500 - Khaki and Pink

WEDZE Adult Merino Wool Ski Socks 500 - Khaki and Pink

Rate: 4.8 stars, 28 votes
5 colours
£11.99
New lower price
WEDZE Adult Ski and Snowboard Socks 100 Plus - Black, Neon Pink and Black

WEDZE Adult Ski and Snowboard Socks 100 Plus - Black, Neon Pink and Black

Rate: 4.6 stars, 1089 votes
6 colours
£7.99
Was £8.99
Last chance
KIPRUN PACK OF 2 PAIRS OF RUN 500 THICK MID RUNNING SOCKS

KIPRUN PACK OF 2 PAIRS OF RUN 500 THICK MID RUNNING SOCKS

Rate: 4.8 stars, 1559 votes
3 colours
£5.99
£3.00/unit
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - White

KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - White

Rate: 4.7 stars, 228 votes
13 colours
£17.99
WEDZE Adult Merino Wool Ski Socks 500 - Burgundy

WEDZE Adult Merino Wool Ski Socks 500 - Burgundy

Rate: 4.8 stars, 28 votes
5 colours
£11.99
WEDZE Adult Ski and Snowboard Socks 100 Plus - Orange and Grey

WEDZE Adult Ski and Snowboard Socks 100 Plus - Orange and Grey

Rate: 4.6 stars, 1089 votes
6 colours
£7.99
WEDZE Adult Merino Wool Ski Socks 500 - Navy Blue

WEDZE Adult Merino Wool Ski Socks 500 - Navy Blue

Rate: 4.8 stars, 28 votes
5 colours
£11.99
WEDZE Men’s Thermal Base Layer Ski Top 1/2 Zip BL 500 - Blue FFS

WEDZE Men’s Thermal Base Layer Ski Top 1/2 Zip BL 500 - Blue FFS

Rate: 4.7 stars, 1166 votes
9 colours
£17.99
QUECHUA Warm Hiking Socks SH500 Mid 2 Pairs

QUECHUA Warm Hiking Socks SH500 Mid 2 Pairs

Rate: 4.6 stars, 4733 votes
14 colours
£12.99
£6.50/unit
WEDZE Adult Ski and Snowboard Socks 100 Plus - Blue and Black

WEDZE Adult Ski and Snowboard Socks 100 Plus - Blue and Black

Rate: 4.6 stars, 1089 votes
6 colours
£7.99
Black Friday
ADIDAS Cushioned Sportswear Crew Socks 6 Pairs

ADIDAS Cushioned Sportswear Crew Socks 6 Pairs

Rate: 3.9 stars, 10 votes
2 colours
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£12.00
£20.0040% off
WEDZE Men’s skiing thermal base layer, 1/2 Zip Top - BL 500 - Navy Blue

WEDZE Men’s skiing thermal base layer, 1/2 Zip Top - BL 500 - Navy Blue

Rate: 4.7 stars, 1166 votes
9 colours
£17.99
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - Navy Blue

KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - Navy Blue

Rate: 4.7 stars, 228 votes
13 colours
£17.99
QUECHUA Warm Hiking Socks SH500 Mid 2 Pairs

QUECHUA Warm Hiking Socks SH500 Mid 2 Pairs

Rate: 4.6 stars, 4733 votes
14 colours
£12.99
£6.50/unit
WEDZE Men’s Warm and Breathable Ski Base Layer Top - BL500 - Blue and Grey

WEDZE Men’s Warm and Breathable Ski Base Layer Top - BL500 - Blue and Grey

Rate: 4.8 stars, 2600 votes
5 colours
£14.99
WEDZE Adult Ski and Snowboard Socks 100 Plus - Yellow and Grey

WEDZE Adult Ski and Snowboard Socks 100 Plus - Yellow and Grey

Rate: 4.6 stars, 1089 votes
6 colours
£7.99
Last chance
WEDZE Adult Ski and Snowboard Socks 100 Plus - Blue and Grey

WEDZE Adult Ski and Snowboard Socks 100 Plus - Blue and Grey

Rate: 4.6 stars, 1089 votes
6 colours
£7.99
VAN RYSEL Road Cycling Base Layer Training - Black

VAN RYSEL Road Cycling Base Layer Training - Black

Rate: 4.7 stars, 2766 votes
7 colours
£17.99
New lower price
ARTENGO High Sports Socks RS 100 Tri-Pack - Black

ARTENGO High Sports Socks RS 100 Tri-Pack - Black

Rate: 4.6 stars, 3807 votes
3 colours
£3.49
Was £4.49
New lower price
WEDZE Adult ski and snowboard wool socks - 900 WOOL - Black

WEDZE Adult ski and snowboard wool socks - 900 WOOL - Black

Rate: 4.6 stars, 469 votes
£17.99
Was £19.99
KIPRUN PACK OF 2 PAIRS OF RUN500 THICK MID-CALF RUNNING SOCKS

KIPRUN PACK OF 2 PAIRS OF RUN500 THICK MID-CALF RUNNING SOCKS

Rate: 4.7 stars, 545 votes
5 colours
£6.99
£3.50/unit
WEDZE Men’s Skiing Warm and Breathable Base Layer Top, 500 - Dark and Light Green

WEDZE Men’s Skiing Warm and Breathable Base Layer Top, 500 - Dark and Light Green

Rate: 4.8 stars, 2600 votes
5 colours
£14.99
Black Friday
ADIDAS Cushioned Sportswear Crew Socks 6 Pairs

ADIDAS Cushioned Sportswear Crew Socks 6 Pairs

Rate: 3.9 stars, 10 votes
2 colours
Sold and shipped by adidas (UK) Limited (ADIDAS UK)
£12.00
£20.0040% off
£2.00/unit
Sale
WEDZE Men’s Warm, Breathable Seamless Thermal Base Layer Ski Top - BL500 - Grey

WEDZE Men’s Warm, Breathable Seamless Thermal Base Layer Ski Top - BL500 - Grey

Rate: 4.7 stars, 354 votes
£9.99
£14.9933% off
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - Black

KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - Black

Rate: 4.7 stars, 228 votes
13 colours
£17.99
New lower price
KIPSTA Football Socks Viralto Club - Black

KIPSTA Football Socks Viralto Club - Black

Rate: 4.6 stars, 3249 votes
17 colours
£5.99
Was £6.99
VAN RYSEL Road Cycling Base Layer Training - Khaki

VAN RYSEL Road Cycling Base Layer Training - Khaki

Rate: 4.7 stars, 2766 votes
7 colours
£17.99
New lower price
DECATHLON Men's Breathable Microfibre Boxers Tri-Pack - Dark Blue/Blue/Khaki

DECATHLON Men's Breathable Microfibre Boxers Tri-Pack - Dark Blue/Blue/Khaki

Rate: 4.6 stars, 620 votes
£13.99
Was £14.99
VAN RYSEL 900 Winter Cycling Socks

VAN RYSEL 900 Winter Cycling Socks

Rate: 4.5 stars, 560 votes
2 colours
£13.99
Black Friday
KIPRUN PACK OF 2 PAIRS OF RUN500 THICK MID-CALF RUNNING SOCKS ENGLAND

KIPRUN PACK OF 2 PAIRS OF RUN500 THICK MID-CALF RUNNING SOCKS ENGLAND

Rate: 4.7 stars, 545 votes
5 colours
£5.99
£7.9925% off
£3.00/unit
WEDZE Men’s Warm and Breathable Ski Base Layer Top, BL500 - White

WEDZE Men’s Warm and Breathable Ski Base Layer Top, BL500 - White

Rate: 4.8 stars, 2600 votes
5 colours
£14.99
4.5/5 based on 2766460 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.