If you want to try making one, I suggest you take at look at the tutorial,
she does a great job of describing each step, but I'll show you a few of mine.
Here's my pattern piece pinned to the lining fabric
Two lining pieces, two outside pieces
Pieces sewn right sides together
Straps complete, then just have to sew right sides together and
turn right side out. Sounds complicated when you first read it,
but makes sense as you go along...trust me.