There are many illegal suppliers who sell fake cashmere with wool/acrylic blends. The yarn made from wool and acrylic can also be very soft and comfortable in feel after treatment, sometimes it is hard to distinguish the two by feel. But cashmere price is several times higher than wool blends.
Cashmere is the finest animal fiber in the world which is very soft and warm. Consinee use best cashmere material no more than 15.5 microns. Cashmere fiber curls naturally and fiber holds tightly together, so the cashmere fabric is very excellent in warm keeping. It is twice in warm keeping ability than wool fiber.
Wool sweater may shrink after wash but cashmere will not. Acrylic may be soft at the first wearing but it may become stiffer and tough after further washing. But cashmere will become softer and softer, smoother and smoother after washing.
Cashmere has great difference in touch with acrylic. You can feel that when you compare these two. Cashmere feels soft and smooth, but acrylic is a little dryer and tougher.