Lululemon Run: Speed Short Sea Stripe Polar Haze Black / Black Size 2 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®