four-way stretch Swift Ultra fabric is lightweight and sweat-wickingwide, smooth Light Luxtreme fabric waistband won't dig in and has LYCRA® for great shape retentionvents at the back for breathability and split legs for freedom of movementcontinuous drawcord so you can find your perfect fitsecure your keys and cards in the back zipper pocket, and pack your gels in the two waistband poucheschafe-resistant flat seams are designed to save sweaty, sensitive skin from irritation