Lululemon Metal Vent Tech Midweight Half Zip - Color: Mineral Blue/True Navy - SIZE L *Only flaw is size tag is worn out* Time to run. Powered by seamless construction, this ventilated, mid-weight half zip keeps air flowing from first to last mile. - Minimal seams to reduce chafe - Sweat-wicking - Midweight - Four-way stretch - Integrated open-hole mesh ventilation increases breathability