To care for your hemp underwear:
Wash on a gentle cycle, with similar colours or separately.
Iron on a low setting while they're still a bit damp.
Try to hang dry, away from direct sunlight. Otherwise, tumble dry on low.
If it shows up a bit stiff, don't worry - hemp gets softer with each wash and wear! If you'd like it to soften faster, feel free to use an environmentally friendly fabric softener.
The strength of hemp means that over time, it won't lose its shape or wear out like other materials. If you take care of hemp well, it will last a long time.