Miu Miu | Accessories | New Authentic Miu Miu Mu57u 。MIU MIU MU57U Irregular-Frame Sunglasses Miu Miu has a more unorthodox ethos driving its designs than its big sister, Prada, and that comes across particularly in its eyewear collection. The folding arms of the MU57U sunglasses are tipped with acetate for comfort and engraved with the brand’s lettering, but it’s the frames that grab your attention with their cloud shape, joined by a polished double bridge across the nose. 100% UV protection MIU MIU “Rather than being young, Miu Miu is immediate.” Miuccia’s vision for Prada’s hipper sister is instinctive and spontaneous. With an independent and creative spirit, Miu Miu is all about utilitarian, feminine and fresh offerings, often delivered with contradictions and surprises, with a through line of luxury.