Under Armour - Undeniable Sackpack. Color Midnight Navy/Midnight Navy/Metallic Silver. $24.95. 5.0 out of 5 stars+3Brand NameUnder ArmourProduct NameUndeniable SackpackColorMidnight Navy/Midnight Navy/Metallic SilverPrice$24.95Rating5Rated 5 stars out of 5(2)