Wear in the crotch of trousers
Short answer: Wear in the crotch happens where the thighs rub against each other. It happens fastest in close fitting trousers and in thin fabrics.
Friction between the thighs
Every step rubs the fabric against itself. The closer the trousers fit, the faster it happens.
A layer underneath
Under-shorts or underpants with a longer leg reduce the friction against the trousers. See bamboo under-shorts.
For men
See the longer models in bamboo underpants for men.
Rotate several pairs
If you wear the same trousers every day, they wear out twice as fast.
Repair
If the fabric has become thin, a hole comes shortly after. It can be sewn, but rarely holds for long.
See the range
See the soft models in bamboo sweatpants for women.
Washing
Wash inside out, so the outside wears least. See the washing guide.
Which trousers wear fastest
Thin jersey trousers and close fitting models wear fastest. Looser trousers in a heavier quality last longer. See sweat clothing.
Frequently asked questions
Why does the crotch wear first?
Because the thighs rub the fabric against itself at every step.
Can it be prevented?
A layer underneath reduces the friction, and several pairs in rotation wear less.
Can the hole be repaired?
It can be sewn, but when the fabric is thin, a new hole soon appears.