The best color to conceal the sweats is the poly-cotton fabric and darker cotton fabric.
In times past, tight see through leggings looked frumpy and easy to stretch.
If you are buying the pants for fashion purpose, then you need to consider the colors and patterns on them.
Do not forget that pants are comfortable clothes, provided you choose the right size when buying.
And don't forget to add some to take your look to the next level - literally! The pants worn at the gyms and as street era made a liberated and bold statement on the women that wear them.
They may even give you a gift card for your hard work.