. Under Armour - Halftime Backpack. Color Castlerock/Matrix Green/Black. On sale for $35.96. MSRP $45.00.. 5.0 out of 5 starsNew+2Brand NameUnder ArmourProduct NameHalftime BackpackColorCastlerock/Matrix Green/BlackPrice$35.96MSRP: $45.00Rating5Rated 5 stars out of 5(5)