First off, power yoga is not your typical low key yoga that everyone and anyone can do, it is a higher paced yoga that is not for the weak.
This means that you need yoga pants that will move with you and rip or tare while you are working out.
Hopefully you have done some kind of exercise before you jump into a class, but if you haven't I would recommend that you shop for exercise clothing depending on how your body is shaped.
If you have a long torso you will need to make sure that you have a long undershirt or an extra long t shirt.
You don't want your skin showing because that means it will be touching the dirty ground where you are doing yoga.
As far as your pants go, you need to make sure that they are not too long.
If you step on them it could cause you to slip and seriously injure yourself, so know that buying the right clothing is not only for style and looks but it can be for your safety as well.
Now there a lot of women that are tall and have a hard time finding pants that are long enough.
Does this sound like you? Don't worry, there are many places online that offer tall yoga pants for you so you aren't flooding all the time.
There are many colors to choose from but pick wisely because there are flattering colors and then there are colors that show every drop of sweat and that can be very embarrassing.
One color that you need to stay away from is gray, it shows off sweat more than any other color.
White is another color that you need to be careful with because it is sometimes see through and then when you combine it with sweat it is even worse.