What Is Fusible Flex-Foam?
If you've ever admired a tote bag that stands upright on the counter, a camera case with a softly padded shell, or a cushion cover that keeps its shape without feeling stiff, you've seen what foam stabilizer can do. Pellon FF78F1 One-Sided Fusible Flex-Foam is a lightweight, easy-to-handle stabilizer that gives projects a professional finish with stability and lasting body — plus a soft, cushioned feel that flat stabilizers simply can't provide.
Flex-Foam is built in two layers: a 100% polyurethane inner foam core laminated to a 100% polyester tricot outer fabric. The foam side gives you that padded, structured body; the tricot side keeps everything smooth and sewable. "One-sided fusible" means one side of the stabilizer has the iron-on adhesive, so it bonds directly to the wrong side of your fabric — no pinning, no basting, no sewing the stabilizer in by hand.
When Flex-Foam Is the Right Choice
Reach for FF78F1 anywhere you want soft structure — projects that should hold their shape but still feel pliable and padded:
- Bag making — tote bags, handbags, and purses that stand up on their own and keep a smooth, professional silhouette. This is Flex-Foam's home turf.
- Protective cases — pouches and organizers for phones, tablets, glasses, or sewing tools, where a little padding protects what's inside.
- Home projects — place mats, cushion fronts, and fabric storage bins that need body without rigid stiffness.
- Apparel and accessories — structured collars, headbands, belts, and costume pieces that benefit from lasting body.
Because it's a foam rather than a flat web, Flex-Foam adds dimension and a gentle loft while staying lightweight — your finished project feels substantial without feeling heavy.
How to Fuse It: Step by Step
- Prewash and dry your fashion fabric if the finished project will be washed, so shrinkage happens before you fuse.
- Cut the Flex-Foam to the same size as your fabric piece. Because the foam is easy to handle, it trims cleanly with scissors or a rotary cutter.
- Place the fusible side against the wrong side of your fabric. The fusible side is the adhesive-coated side; the smooth tricot side faces out.
- Press with a hot iron — lift and press rather than sliding the iron, using steam or dry heat according to your fabric's requirements. Hold the iron in place for the time your project needs to bond the adhesive fully.
- Let it cool flat so the bond sets before you start cutting, sewing, or moving the piece.
One-sided fusible stabilizer is especially handy for bag making: you fuse it to the outer fabric and the tricot side then glides smoothly against your lining during assembly — no drag, no bunching.
Tips and Care
- Sew normally once fused. The foam and tricot sew cleanly on a standard machine — use a walking foot if you're sewing through multiple layers or bulky seams.
- Trim seam allowances in the foam before turning small pieces right-side out for crisper corners and edges.
- Test first. Always test-fuse a scrap of your exact fabric to check the bond, the hand feel, and that the heat setting doesn't mark the fabric.
- Care for the finished project follows the care instructions of your fashion fabric — hand or machine wash, or dry clean, as the fabric requires.
Sold on a 20" x 10 yard bolt, FF78F1 gives you plenty of stabilizer for a run of bags, a set of organizers, or a season of gifts — one bolt goes a long way at this width.
Shop the Pellon® FF78F1 One-Sided Fusible Flex-Foam Stabilizer 20" x 10 yards Bolt. at Linda's Electric Quilters.
