New Without Tags Ella Size Medium Tropic Gaucho Pants Like Silk. The fabric is 100% Polyester but there is a tag that reads "do not go around fire". These pants are flammable. They feel much like silk. The waist has an elastic band and has generous stretch. Laying flat and fully stretched the waist goes to 19". The size, refer to picture, is a size Medium. The Inseam is 21". The design is flowers and Is actually adorable.