The Sleeve

I have been trying to draw the kind of folds. There are seven kind of folds.

1. Pipe fold.
2. Zigzag fold.
3. Spiral fold.
4. Half-lock fold.
5. Diaper fold.
6. Drop fold.
7. Inert fold.

I have tried to make a sleeve, and capture in drawing for several kinds of folds such as half-lock, spiral and zigzag folds. Learn to draw will need continues practice, hopefully I can do this.

As a note : I made several edit on my drawing, to get more contrast because the real drawing is softener. As you can see below.