Foam Interfacing
At Bobbin Girl, we offer two types of foam interfacing:
Fusible foam is applied to the back of your fabric using a steam iron and a pressing cloth
Sew in foam is attached by basting it to your fabric within the seam allowance
Many bag makers prefer sew in foam because fusible foam can sometimes lift during the construction process, especially when turning a bag right side out. It can also be more prone to wrinkling.
To help minimise these issues, I have two tips for working with foam interfacing that can make a big difference:
1. Apply fusible woven interfacing first.
Before adding fusible foam, iron fusible woven interfacing onto the wrong side of your outer fabric pieces. This adds structure and helps the foam bond more securely.
2. Use HeatnBond Lite with sew-in foam.
Treat it like you would in appliqué. Iron HeatnBond Lite onto the back of the foam (without steam), then peel off the paper backing. When you press your fabric onto it, the adhesive bonds the foam to the fabric. It’s quick, easy, and helps reduce wrinkling while preventing the foam from separating during construction.