Underwear that rides up in the crotch

Short answer: Riding up comes from too little fabric across the seat or from a material that is too slippery. Choose a style with more coverage at the back and a little elastane.

What makes them ride up

When there is not enough fabric to cover the seat, the leg edges are pulled upwards every time you move. If the fabric is also smooth and has no elastane, it slides further. That is why it gets worse through the day rather than better.

Look at the leg edge

A wide, soft leg edge with some grip stays put, while a narrow elastic digs in and travels. Edges with silicone on the inside stay best under smooth trousers. See bamboo underwear briefs for men.

Style rather than size

Going up a size gives you more fabric but not necessarily better coverage. Choose a style with longer legs or more fabric at the back instead. Boxer shorts with long legs often ride up less than short trunks.

The material makes a difference

A few percent elastane gives the fabric grip so it follows the body instead of sliding. Completely smooth fabric with no stretch is the most common cause. See bamboo underwear for men and bamboo inner shorts.

Frequently asked questions

Does a larger size help

Only if they are too small. Otherwise you get more fabric that folds and rides up more.

Do trunks ride up more than boxer shorts

Often yes, because the leg is shorter and has less to hold onto.

What about double sided tape

It works for a day but it is a stopgap. Choosing the right style solves it for good.