If Speedy Gonzales trained for a 10K, we're pretty sure he'd do it in these shorts. Why we made this We made these shorts to keep us feeling comfortable and cool on training runs and on race day. The lightweight Swift fabric is moisture-wicking and the soft Luxtreme waistband and continuous drawcord ensure a proper fit so we can streak past our personal records. Ándale! Key features vents at the back for breathability and split legs for freedom of movement continuous drawcord so you can cinch in a pinch secure your keys, gels and cards in the zipper pocket on the back of the waistband chafe-resistant flat seams are designed to save sweaty, sensitive skin from irritation wide, smooth Luxtreme waistband won't dig in Tech specs designed for: run fabric(s): Luxtreme®, COOLMAX®, Swift properties: moisture-wicking, quick-drying, chafe-resistant, breathable rise: low inseam: 2 1/2" leg opening: 26 3/8" liner: yes - COOLMAX®