Underwear on the day of your first half marathon

Short answer: On race day the underwear should be something you know from training, and that sits calmly for all 21 kilometres. Choose soft clothing without rough seams in a fit you have tried on long runs, and never use anything new on the day itself.

Nothing new on race day

The oldest rule in running applies to underwear too. Everything you put on for race day should have been tried on at least one long training run. A small seam that did not bother you over five kilometres can chafe after fifteen. Find your set in good time, and stick with it.

A fit that stays in place

Underwear that creeps up or rolls becomes annoying long before the finish line. Choose a fit that is snug enough to stay in place, but does not cut into the skin or chafe the groin. Run, jump and bend in it at home before you decide.

Seams and edges

It is the seams and edges that chafe, not the fabric itself. Feel the inside and look for flat, soft seams and edges that do not press. If a pair has chafed on a long run, it is not right for race day, however good it looks on the hanger.

A layer on the upper body

On a cold morning a thin layer next to the skin can be pleasant before the start. Read more about bamboo undershirts for men if you want a soft layer you can take off when you warm up. The tank top is also an option on a warm day.

A tank top for warmer days

When it is warm, a tank top can give more air around the shoulders and down the arms. It should fit so that it does not rub in the armpits. See the range of bamboo tank top for men if you want a light layer that lets the arms move freely.

Socks that do not give blisters

The feet work hardest in a half marathon, and a sock that folds can cause blisters. Choose a pair you have tried on long runs and that does not ripple under the heel. You can find them among the socks for men and women.

Before the start and after the finish

Pack a dry shirt and dry socks in the bag, so you can change quickly after the run. If you are wet and cold while you wait, the body cools down fast. Bring a jacket or sweatshirt too, so you do not get cold while you look for your bike or car.

Washing and care

Wash the clothes according to the care label, usually at a low temperature and without fabric softener. Hang them to dry and put them away only when they are completely dry. If you have developed sore spots, talk to your doctor if the skin does not heal by itself.

Frequently asked questions

When should I try the underwear for the race?

Try it in good time on at least one long training run, ideally of similar length to the race. Then you know whether it sits well and does not chafe before it counts.

How do I avoid sore spots?

Choose clothes with soft seams and a fit that does not roll or flap. Many people also use a neutral skin cream, but try it in training first.

What should I bring for after the race?

A dry shirt, dry socks and a jacket or sweatshirt, so you can change quickly and stay warm while you wait and walk home.

You can find the full range at Copenhagen Bamboo.