Softshell

A softshell is a stretch technical jacket, with panel seams and a stand collar.

Views: Front and back, drawn together
Named layers: Sleeve L, Sleeve R, Inside Back, Cuff L, Cuff R, Body and Panel Seams and 3 more
Anchors: 191 on the front, only where a line turns
File: Editable vector in Adobe Illustrator

How to draw a softshell flat in Illustrator

Open Flat Library in Adobe Illustrator and go to Outerwear.
Choose Softshell from the pictures. It is drawn on the template, front and back.
Pull the blue points to change its length, width, neck and sleeve. The front and back redraw together, and the figure stops you going too tight.
Insert it into your document as clean, named layers, and keep working by hand.