Athleta is part of the GAP/Old Navy family. Unlike their sister brands, Athleta ALWAYS accepts returns if you are dissatisfied with the product. I am a huge fan of their chaturanga pants and relay crop leggings.
Athleta makes a great alternative lululemon’s Align leggings with their Powervita collection. Athleta also makes activewear for teens. They're also a Certified B Corporation, which means they're eco-friendly and plan on eliminating as much waste in their manufacturing process as possible.
Check out my Athleta reviews here.
Sizing: True to Size (order a size small if you are a size 6 lululemon). Sizes range offered in Regular, Tall, Petite and Plus Size.