Under Armour Women's Heatgear&reg; Sonic All-in-one X Large Black/blue 1236488 WHAT'S IT DO? Extraordinary ladies shouldnt have to settle for the same old workout gear. You need fits and patterns that are just as bold as you are. Good thing we created HeatGear Sonic. An update to our signature HeatGear fabric, HeatGear Sonic delivers an incredible next-to-skin fit that is softer, lighter, and more comfortable than ever. And because its HeatGear, it wicks moisture to the surface, so it dries fasterkeeping you fit and focused no matter what. Finished with bright color pops and bold patterns, you can say goodbye to your boring old gear for good.