. Under Armour Kids - Multi Dye Flutter Bikini (Big Kid). Color Photon Blue. Low Stock. On sale for $30.52. MSRP $40.00.. Best Seller9 left in stockBrand NameUnder Armour KidsProduct NameMulti Dye Flutter Bikini (Big Kid)ColorPhoton BluePrice$30.52MSRP: $40.00Rating