Sulky Of America 12 Color 3mm Puffy Foam Assortment, 6" by 9" (45100S) A permanent iron-on cover a stitch stabilizer that protects SenSitive Skin from Scratchy Stitches; AS a Stabilizer, it prevents shredding or distortion due to heavy needle Penetrations when embroidering, without changing the hand Or Drape Of The Fabric; A Soft And Flexible Knit Mesh