This is a polyester boning, the same style as Rigilene Boning (Rigilene is a brand name of selectus) A stranded boning, which is washable, and easily cut to the desired length, can be sewn on directly for use in bodices. commonly used in costumes, and other craft projects where some structure is required NOT SUITABLE FOR TIGHT LACED CORSETS!!  use same size endocarps as boning.