Washing and care instructions for Spandex garments:

The first time you wash the garment, wash in cold water with 1/2 cup of salt (the salt sets the colour)
Hang to dry, do not put in the dryer with heat.
No bleach, no vinegar, no Woolite, no Zero.
Do not iron.
Regularly wash in cold water, then hang to dry.
Rinse as soon after wearing as possible, then dry.

Do not leave a damp garment in a bag after wearing.