Fusible bias tape
A 1 cm wide adhesive tape cut on the bias, used to stabilize delicate edges like necklines and armholes.
Where it is used
Apply Bias Fusible Tape
p. 3- Apply the bias fusible tape along the neckline edges. Use a 10 mm wide tape and position it 2–3 mm away from the edge so the tape's border will be caught in the stitching.

Armhole Reinforcement
p. 7- On the wrong side, reinforce the armhole edges with bias fusible tape. Beforehand, make a few small snips along the tape where it curves (at the side panel area).
