The Teflon coating on the base of this foot is perfect when working with sticky surfaces such as vinyl, faux leather, plastic and laminated fabrics. It also slides smoothly on heavy fabrics like denim and fleece when stitching multiple layers. The Teflon foot moves smoother when it crosses over seams especially on fabrics like vinyl. The raised markings on the toe of the foot indicate the needle to help guide your fabric for accurate stitching. There is a built in tape slot in the front of the foot, use this slot when adding tape, elastic or ribbon.