shoe drawings

I've been doing more drawing from life lately (which always dramatically improves the way I see)  and have been fascinated with the drawing possibilities inherent in shoes.  They have so much personality, and so many different forms within the overall structure.  Each of these sketches took about ten minutes.  (I also don't have many opportunities these days to wear fancy shoes, but I can at least appreciate their artistic merits from the comfortable vantage point of my everyday boots.)