Under Armour Kids - Fly By Shorts (Big Kids). Color Castlerock/Castlerock/Reflective. On sale for $21.38. MSRP $25.00.. 5.0 out of 5 starsAdd to favorites. 0 people have favorited this+5Brand NameUnder Armour KidsProduct NameFly By Shorts (Big Kids)ColorCastlerock/Castlerock/ReflectivePrice$21.38MSRP: $25.00Rating5Rated 5 stars out of 5(7)