How to sew a cup-shaped cloth mask Remote video URL. Hedy Khoo. STFood Online Editor. Updated. Published. Apr 10, 2020, 08:00 PM. More. ... 20. Cut away the excess of fabric C. 21.

To create the inner flap of the mask: Take each piece of fabric C, right side facing down, and make a double fold (0.5cm wide) from the edge of the long side. Sew 0.2cm from the edge. 17.