With that fabric I used -
- a 'stretch' needle,
- sewing machine and O/L
- woven tape in the shoulder seams for support, to keep them the same length and to prevent them from distorting or stretching,h
- a strip of a lightweight hem tape (a light fusible web like wunderweb) to stabilise and control the hems before stitching. A lightweight knit/stretch interfacing would have done the same job.