Ralph Lauren Purple LabelSilk-Cotton Knit Quarter-Zip Sweaterclassic chairman navQuarter-zip sweaters are the peak of casual elegance, and this design from Ralph Lauren Purple Label provides the proof. It’s textured knitting gives the look a touch of intricacy, while the silk-cotton fabric is smooth, soft and stretchy, making it the perfect choice for feeling as relaxed as you look.Quarter-zip sweaters are the peak of casual elegance, and this design from Ralph Lauren Purple Label provides the proof. It’s textured knitting gives the look a touch of intricacy, while the silk-cotton fabric is smooth, soft and stretchy, making it the perfect choice for feeling as relaxed as you look.