Swift fabric is four-way stretch, sweat-wicking, and lightweight four-way stretch sweat-wicking lightweight features Designed for: Run Sweat-wicking liner: Built-in Luxtreme® fabric liner is sweat-wicking and four-way stretch Secure pocket: Secure back pocket to store your essentials Hidden pockets: Stash your stuff in the liner's drop-in pockets Lycra®: Added Lycra® fibre for stretch and shape retention Storage: Easy-access gel pockets on the waistband Inseam: 3.5"