Under Armour HeatGear AmourVent Apollo Running Shorts - AW15 Lightweight 4-way stretch fabrication - Allows greater mobility in any direction. ArmourVent mesh panel - Delivers true breathability in a light, stretchy, durable, fast-drying fabric. Internal mesh liner - Helps moisture escape and adds breathability. Moisture Transport System - Wicks sweat away from the body. Anti-odour technology - Prevents the growth of odour-causing microbes.