Semi Worsted Cashmere V-neck Sweater. Tubular jersey knit v-neckline. Full length sleeves. Tubular jersey knit sleeve and bottom hems. Semi Worsted Cashmere (CSW) yarn is made by combing the cashmere fibers before spinning them into yarn to ensure that the fibers all run parallel to each other and lie in the same direction. This creates a yarn that is smoother and more compact than regular woolen cashmere, creating a more substantial body that has greater recovery and less pilling.