Lululemon sz 4 Thomas Edison said that genius is one percent inspiration, ninety-nine percent perspiration. Most of that ninety-nine percent was behind our knees so we included Mesh panels to keep the air moving. Key features secure the waistband with a continuous drawcord that won't come out in the wash Mesh venting keeps the back of your knees cool stash your valuables in the secure zipper pocket in the back grab your gels easily from the two pockets stashed in the front of your waistband we don't like chafing either, that's why we use chafe resistant flat seams imported Fit + function designed for: run fabric(s): Power Luxtreme™ , Mesh rise: medium