Billabong Sunrays Marina Underwire Bikini Top. Billabong's Sunrays Marina Underwire Bikini Top delivers full bust support with style to spare. Featuring adjustable straps with O rings and a back hook closure for your perfect fit. The seam detailing and metal accent add a touch of sophistication, while partially recycled materials keep you feeling good in and out of the water. No cups. Circle metal plate at wearer's left back tail. Full bust coverage. 83% Recycled Nylon 17% Spandex. Hand wash. Imported.