My Son in Law is graduating with his Phd in geotech engineering. His new job will require half office and half on site visits. He is a casual, athletic, fleece and jeans kind of guy. I want to get him a gift to celebrate his Phd. The only thing I came up with was a portfolio. Leather might be to "fancy pants" for field work so a nice ballistic nylon perhaps? Maybe a ballistic nylon carry all? Any other ideas would be appreciated.