The Elastic arrived as a large lasso making it easy to cut/use. The material is similar to the soft round fabric type elastic used in hospital issue masks but it’s flat, and although the description says 1/4”, it’s more like 3/8. Washability is still to be determined. I attached a pic of the actual one received, the black is a true 1/4” elastic and I included the 1/8” round for your comparison. Rating was dropped a star because of the width discrepancy.