I have used Hobbs fusible batting a few times, I use it for small ( smaller than a queen sized quilt) projects. I especially like it for odd shaped projects like tree skirts. You just launder your finished project to soften it up- the fusible washes away- it’s just there to hold your sandwich together while you stitch/ quilt it instead of thread or pin basting. I do usually still pin around the edges just to help keep it together After fusing the second side be sure to turn it over and check the other side again- sometimes things happen...