Under armour heatgear supervent 20 34 tightsunder armours heatgear supervent 34 tights are made from a polyelastane blend with coolswitch a material that uses an elite coating on the inside this pulls heat away from the skin to keep you cool capable of performing longer greater mobilitythe breathable armourvent mesh back panel is exceptionally sturdy provides exceptional ventilation while the 4 way stretch fabric allows for superior mobility in any direction these tights also have a