Fast2fuse is a double-sided fusible stiff interfacing. Some of the at tributes are Fast2fust is: stiff, it holds its shape and provides excellent support. Flexible, it can form graceful curves, be folded, pinched and manipulated. Dense, strenght without bulk but it won't compress when sewn. Fusible, on both sides to eliminate messy spray adhesives. Ideal for tote bags, storage boxes, everthing that needs stay-in-place firmness.