These PR 10ZS sunglasses from Prada are crafted in a lightweight, durable plastic that?s strong enough to stand up to wear after wear. The rectangular rims are gently curved for a more feminine look, and feature slightly thickened endpoints for added stability behind the ears. A subtle keystone shape at the brow end draws attention to your eyes while they remain hidden behind the shades themselves, a clever optical trick courtesy of designer Luca Venturi at Prada.