Make your race days feel fast and focused in this streamlined runsie. swift ultra light Swift Ultra Light fabric is an airy, lightweight fabric woven to provide airflow—seriously, it’s like being in the buff. lightweight four-way stretch sweat-wicking quick-drying features Designed for: Run Reflective hem: Hidden reflective hem details help you stay visible Relaxed sensation: Gives you the ultimate feeling of nothing in your way—it sits away from your body to give you maximum room to move Hidden card pocket : Built-in brief liner has a hidden card pocket Laser-cut hem: Laser-cutting allows for the lightest weight possible Easy on, easy off: The cross-strap back makes quick changes a breeze