Sulky ActionBack is a permanent, cut-away stabilizer designed to provide superior permanent stability for embroidery and decorative stitching on stretch, slippery fabrics. ActionBack is stable in both directions to prevent drifting outlines, bunching and puckering. Easily embroider performance-weight fabrics that have varying degrees of stretch, such as moisture-wicking, spandex, microfiber, and more!This cut-away variety remains as a separate layer behind the fabric after embellishing to retain the fabric stretch and drape. ActionBack also supports all sorts of stitch densities, from lightweight line-art styles to heavy stitch fills, without puckering or buckling. Fiber Content: 50/50 Poly/Cotton Blend.