This women's clothing set features a two-piece design consisting of a cardigan and a matching top, both likely made from a ribbed fabric. The "2 in 1" suggests the set is intended to be worn together, offering versatility in styling options - the cardigan can be worn open or closed over the top, or each piece can be styled separately. The "Come RIB" strongly suggests the fabric is a ribbed knit, providing texture and potentially a comfortable, slightly stretchy fit.