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.
2,171 items
KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS

KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS

(2679)
5 colours
£4.99
KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS

KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS

(2679)
5 colours
£5.99
£3.00/unit
KIPRUN RUN900 5-TOE RUNNING SOCKS - BLACK

KIPRUN RUN900 5-TOE RUNNING SOCKS - BLACK

(1472)
£9.99
Sale
WEDZE Men’s Warm and Breathable Loose-Fit Ski Base Layer 500 - Beige / Black / Graph

WEDZE Men’s Warm and Breathable Loose-Fit Ski Base Layer 500 - Beige / Black / Graph

(218)
2 colours
£12.99
£17.9927% off
KIPRUN PACK OF 2 PAIRS OF RUN500 FINE CREW RUNNING SOCKS

KIPRUN PACK OF 2 PAIRS OF RUN500 FINE CREW RUNNING SOCKS

(2078)
2 colours
£5.99
£3.00/unit
New lower price
KIPSTA Football Socks Viralto Club - Black

KIPSTA Football Socks Viralto Club - Black

(3213)
10 colours
£5.99
Was £6.99
New lower price
WEDZE Men's Warm, Breathable Turtleneck Ski Base Layer 500 - Dark Blue

WEDZE Men's Warm, Breathable Turtleneck Ski Base Layer 500 - Dark Blue

(436)
2 colours
£17.99
Was £19.99
ARTENGO High Tennis Socks RS 500 Tri-Pack - White

ARTENGO High Tennis Socks RS 500 Tri-Pack - White

(14813)
5 colours
£7.99
£2.67/unit
Sale
KIPRUN Running Socks Run 100 3-Pack - black

KIPRUN Running Socks Run 100 3-Pack - black

(21235)
2 colours
£3.99
£4.4911% off
£1.33/unit
Sale
HEAT HOLDERS 3 Pair Multipack Ultra Lightweight Mens Thermal Ski Socks

HEAT HOLDERS 3 Pair Multipack Ultra Lightweight Mens Thermal Ski Socks

2 colours
Sold and shipped by Sock Snob UK
£22.36
£25.9913% off
2 for £30
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - White

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

(733)
13 colours
£17.99
QUECHUA Sock Hike 100 High 2-Pack - black

QUECHUA Sock Hike 100 High 2-Pack - black

(3940)
3 colours
£8.99
£4.50/unit
New lower price
WEDZE Men’s Seamless Ski Base Layer Bottoms - BL 900 - Blue

WEDZE Men’s Seamless Ski Base Layer Bottoms - BL 900 - Blue

(125)
£34.99
Was £39.99
New lower price
KIPSTA Adult Football Socks Essential - Blue

KIPSTA Adult Football Socks Essential - Blue

(1410)
4 colours
£2.99
Was £3.99
WEDZE Men’s soft and seamless ski base layer top BL 500 - Black / Blue

WEDZE Men’s soft and seamless ski base layer top BL 500 - Black / Blue

(927)
2 colours
£27.99
KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS

KIPRUN PACK OF 2 PAIRS OF RUN 500 THIN INVISIBLE RUNNING SOCKS

(2679)
5 colours
£5.99
£3.00/unit
KIPRUN Running Socks Run 100 3-Pack - white

KIPRUN Running Socks Run 100 3-Pack - white

(21235)
2 colours
£3.99
£1.33/unit
2 for £30
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - Khaki

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

(733)
13 colours
£17.99
ARTENGO Mid Sports Socks RS 500 Tri-Pack - White

ARTENGO Mid Sports Socks RS 500 Tri-Pack - White

(10470)
4 colours
£7.99
£2.67/unit
Sale
WEDZE Men’s round-collared wool ski base layer top, BL500 - Navy Blue

WEDZE Men’s round-collared wool ski base layer top, BL500 - Navy Blue

(124)
£39.99
£54.9927% off
CODE BUNDLE15
QUECHUA Warm Hiking Socks - SH100 MID - 2 Pairs

QUECHUA Warm Hiking Socks - SH100 MID - 2 Pairs

(3577)
2 colours
£8.99
£4.50/unit
INOVIK MEN'S 900 THERMAL CROSS-COUNTRY SKIING BASE LAYER BOTTOMS

INOVIK MEN'S 900 THERMAL CROSS-COUNTRY SKIING BASE LAYER BOTTOMS

(54)
£24.99
QUECHUA Sock Hike 50 High - Pack of 2 pairs - Grey

QUECHUA Sock Hike 50 High - Pack of 2 pairs - Grey

(2629)
£5.99
£3.00/unit
SEALSKINZ Waterproof Warm Socks Sealskinz Wiveton Mid length

SEALSKINZ Waterproof Warm Socks Sealskinz Wiveton Mid length

(2)
£27.99
VAN RYSEL 920 Windproof Long-Sleeved Winter Cycling Base Layer

VAN RYSEL 920 Windproof Long-Sleeved Winter Cycling Base Layer

(235)
£37.99
Last chance
WEDZE Men's Breathable, Comfortable Seamless Skiing Base Layer Top BL900 - Blue Grey

WEDZE Men's Breathable, Comfortable Seamless Skiing Base Layer Top BL900 - Blue Grey

(305)
£49.99
KIPSTA Adult Short-Sleeved Thermal Base Layer Top Keepdry - Black

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

(118)
3 colours
£14.99
ARTENGO Low Sports Socks RS 500 Tri-Pack - Black

ARTENGO Low Sports Socks RS 500 Tri-Pack - Black

(5634)
3 colours
£7.99
£2.67/unit
ARTENGO Low Sports Socks RS 500 - Pink/White/Green Patterned

ARTENGO Low Sports Socks RS 500 - Pink/White/Green Patterned

(5634)
3 colours
£7.99
INOVIK MEN’S THERMAL CROSS-COUNTRY SKI BASE LAYER 900 – BLACK

INOVIK MEN’S THERMAL CROSS-COUNTRY SKI BASE LAYER 900 – BLACK

(108)
3 colours
£29.99
New lower price
WEDZE Men's Warm, Breathable Turtleneck Ski Base Layer 500 - Light Grey

WEDZE Men's Warm, Breathable Turtleneck Ski Base Layer 500 - Light Grey

(436)
2 colours
£17.99
Was £19.99
New lower price
KIPSTA Adult Football Socks Essential - White

KIPSTA Adult Football Socks Essential - White

(1410)
4 colours
£2.99
Was £3.99
KIPSTA Adult Football Undershorts Keepcomfort - Black

KIPSTA Adult Football Undershorts Keepcomfort - Black

(575)
2 colours
£9.99
2 for £30
KIPSTA Adult Long-Sleeved Thermal Base Layer Top Keepdry - Grey

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

(733)
13 colours
£17.99
Sale
HEAT HOLDERS 3 Pack Mens Patterned Lightweight Thin 2.3 TOG Thermal Knee High Ski Socks

HEAT HOLDERS 3 Pack Mens Patterned Lightweight Thin 2.3 TOG Thermal Knee High Ski Socks

6 colours
Sold and shipped by Sock Snob UK
£22.36
£34.9936% off
Sale
HEAT HOLDERS 3 Pair Multipack Ultra Lightweight Mens Thermal Ski Socks

HEAT HOLDERS 3 Pair Multipack Ultra Lightweight Mens Thermal Ski Socks

2 colours
Sold and shipped by Sock Snob UK
£22.36
£25.9913% off
CODE BUNDLE15
QUECHUA Warm Hiking Socks - SH100 MID - 2 Pairs

QUECHUA Warm Hiking Socks - SH100 MID - 2 Pairs

(3577)
2 colours
£8.99
£4.50/unit
Sale
SOLOGNAC BASE LAYER FLEECE TROUSERS 500 BROWN

SOLOGNAC BASE LAYER FLEECE TROUSERS 500 BROWN

(54)
£19.99
£24.9920% off
CODE BUNDLE15
WEDZE ADULT SKI SOCKS - 900 CELLIANT©

WEDZE ADULT SKI SOCKS - 900 CELLIANT©

(174)
£14.99
Was £19.99
SOLOGNAC Merino wool hunting socks ACT 500

SOLOGNAC Merino wool hunting socks ACT 500

(216)
£6.99
4.4/5 based on 972190 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.