Underwear that does not ride up

Short answer: Whether underwear rides up depends on the width of the gusset, the leg length and the size. A style with a wide gusset and slightly longer legs usually stays in place all day.

The gusset needs width

If the gusset is narrow, the fabric has no surface to rest on and pulls together as soon as you walk or sit. A wider gusset spreads the fabric over a larger area and stays still. See how the crotch is cut on the styles in bamboo jogging suits, which are made for movement.

Longer legs hold better

Short legs only have a short way to travel before they sit right up. Longer legs are held over a larger area of the thigh and move less when you walk. Many people find the problem disappears when they switch to a slightly longer leg. See the different leg lengths in bamboo boxers.

Size decides the rest

A piece that is too small rides up because the fabric lacks room to follow the body. One that is too large gathers in folds that also creep upwards. Choose your usual size and measure again if unsure. The same goes for the rest of the drawer, from briefs to a bamboo bra.

How the fabric stretches

A little elastane helps, because the fabric follows the body instead of folding. With each step it stretches and returns. Fabric with no stretch cannot do that, so it gets pushed upwards. Look for a soft fabric with some stretch if your underwear often shifts during the day.

Warm days are the worst

Moisture makes fabric and skin stick together, and movement then drags the fabric along. That is why many notice the problem most in summer or after a busy day. A fabric that moves moisture away from the skin slides more easily. A spare pair in your bag is another simple fix on very warm days.

The thighs play a part

If your thighs touch when you walk, they push the fabric with every step. That is completely normal and one of the most common reasons short legs ride up. Longer legs are the best answer here, because the fabric then lies between the thighs and protects the skin from chafing.

The trousers on top

Tight trousers can pull your underwear along when you sit and stand. If they are snug in the crotch, they rub against the underwear and take it upwards. Looser trousers or a cut with a little more room in the crotch leave the underwear alone. Check your trousers too if the problem continues.

When the fabric wears

Over time the elastic at the leg loses its grip and the fabric loses some of its spring. Then even a good style starts to ride up. Wash at 40 degrees and air dry to make the elastic last longer. If a piece that used to fit well now shifts, it is usually time for a new one.

Frequently asked questions

Does more elastane help

A little elastane helps, because the fabric follows the body instead of folding. It still needs to be combined with the right size and a wide enough gusset.

Why does it happen most on warm days

Moisture makes fabric and skin stick together, and movement drags the fabric along. A fabric that moves moisture away and a change at midday both help.

Are hot pants a solution

For many, yes. The long legs lie between the thighs and prevent both chafing and riding up. It is often the simplest answer if shorter styles always move.