Swimsuit by PS Paul Smith, Just add water, Halter neck tie, Non-padded, Underwire cups, Mesh panels, Who needs X-ray vision anyway?, Brief-cut leg. The diffusion line of the quintessentially British Paul Smith label, PS Paul Smith channels the same sophistication of the main line but with a playful, youthful exuberance. Expect contemporary, clean lines, soft tailoring and whimsical prints, all in keeping with Paul Smiths classics with a twist mantra.