Underwire bikini top by Piha, Moulded contour cups for a naturally round shape, Underwire support, Adjustable straps for a great fit, Clip clasp closure. ABOUT PIHA New Zealand swimwear label Piha brings a fresh, youthful style to their collection of mix and match bikinis. Confident and adventurous, Piha splash bold sunset prints, stripes and florals across soft cup bikini tops, vibrant coloured underwired swim sets and matching bikini briefs.