Underwear

Good underwear is the basis of every comfortable trail run. Avoid chafing, stay dry and move freely with technical underwear designed for intense exercise. Invisibly important, but essential for every run.
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  • Hastko Bra No. 42 Endurance Sports Bra in black – product photo front
    To 16% discount

    Hastko Bra No. 42 Endurance Sports Bra

    Seamless sports bra for running, trail running and long runs

    (4)
    By € 7495 8895
  • Hastko Bra No. 92 Sports Bra in black – product photo back with crossed straps

    Hastko Bra No. 92 Sports Bra

    Sports bra with extra firm support for short, intense workouts

    (1)
    € 9895
  • Hastko Bra No. 38 Sports Bra in black – product photo front
    To 16% discount

    Hastko Bra No. 38 Sports Bra

    Sports bra for fitness, CrossFit, cycling and tennis

    (1)
    € 7495 8895
  • Wise Dry Bra Sports Bra Women's in black – front

    Wise Dry Bra Sports Bra Women's

    Light sports bra with side pockets for trail running and long runs

    35 g

    € 8995
  • Compressport Feelfree Seamless Bra in black – with heart rate strap underneath

    Compressport | Feelfree Seamless Bra | Sports Bra

    Seamless sports bra for trail running and long runs

    86 g

    (2)
    € 5995
  • Hastko Panty No. 91 Sports Underwear in black – product photo front
    To 18% discount

    Hastko Panty No. 91 Sports Underwear

    High-waisted sports underwear for trail running, yoga and climbing

    € 3295 3995
  • Hastko Shorty No. 19 Sports Underwear in black – product photo front
    To 18% discount

    Hastko Shorty No. 19 Sports Underwear

    Seamless sports underwear for running, trail running and training

    By € 3295 3995
  • Hastko String No. 19 Sports Underwear in black – product photo front
    To 17% discount

    Hastko String No. 19 Sports Underwear

    Seamless sports thong for running, trail running and yoga

    € 2995 3595
  • Compressport Feelfree Seamless Panty Women in black – front view

    Compressport | Seamless Panty | Sports underwear

    Seamless sports underwear for women for trail running and long runs

    19 g

    € 2995
  • Bandit Vanisher Threshold Run Bra in blauw – achterkant, hand bij het vak op de rug

    Bandit Vanisher Threshold Run Bra

    Sports bra for running with pockets for phone english

    35 g

    € 8995
  • Raidlight Aero Trail Underwear Women in black – front view

    Raidlight Aero Trail Underwear Women

    Trail running underwear for women for long runs and warm weather

    35 g

    € 2995
  • Dynafit Alpine Graphic Bra in cream with black print – worn, front view
    To 25% discount

    Dynafit Alpine Graphic Bra

    Sports bra for trail running and mountain sports on warm days

    76 g

    € 4496 5995
  • Hastko Bra No. 39 All Terrain Sports Bra in black – product photo front
    To 19% discount

    Hastko Bra No. 39 All Terrain Sports Bra

    Supportive sports bra for running, trail running and any other sport

    (1)
    € 7995 9900
  • Hastko Tanga No. 23 Sports Underwear in black – product photo front
    To 17% discount

    Hastko Tanga No. 23 Sports Underwear

    Seamless high-waisted sports underwear for running and training

    (1)
    By € 2995 3595
  • Fusion Womens Top Sports Bra in black – front view

    Fusion Womens Top

    Sports bra with light support for running, yoga and training

    55 g

    (2)
    € 5495
  • Compressport Seamless Boxer Women in black – front view with wide waistband

    Compressport | Seamless Boxer | Sports Underwear | Women

    Seamless sports underwear for trail running and long runs

    39 g

    (1)
    € 2995
Ondergoed - Trail.nl

Underwear for trail running

The right underwear makes a world of difference during trail running. It ensures comfort, prevents irritation, and helps your body stay dry and warm – from short runs to long ultra-trails.

What is technical underwear?

Technical underwear is specially developed for sports and the outdoors. It is made from breathable, quick-drying materials that efficiently wick away sweat and minimize chafing. Think of boxers, briefs, or sports bras that fit seamlessly to your body.

When do you use technical underwear?

  • During every trail run, short or long
  • In warm weather to wick away sweat
  • In cold conditions as the first layer
  • During matches where comfort is crucial

Good underwear is not a luxury, but a must-have for every trail runner.

What do you look for when choosing?

Material
Choose synthetic fabrics or merino wool. These are breathable, quick-drying, and odor-inhibiting.

Fit
Tight enough to prevent chafing, but without pinching.

Seams & finishing
Flatlock seams or seamless designs reduce irritation.

Moisture regulation
Essential to stay dry and comfortable, especially during prolonged exertion.

Different types of underwear

  • Boxers & slips – for support and comfort
  • Sports bras – especially for intensive exercise
  • Merino underwear – ideal for fluctuating temperatures
  • Seamless underwear – minimizes the risk of chafing

FAQ

Can I just wear cotton underwear?
Not recommended. Cotton retains moisture and increases the risk of chafing and irritation.

How do I prevent chafing during long runs?
Choose well-fitting, technical underwear and use anti-chafing products if necessary.

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