Under Armour is offering a 10% discount for first responders, both online and in-store. Click here to read the instructions on how to get the discount online.
For in-store discounts, showing your FD ID at the register should do it. As usual, ask first if the discount is available, it may vary depending on the store.
Under Armour has a store at 7051 S Desert Blvd, Canutillo, TX 79835