Avenue M0ntaigne Striped Stretch Bottom Weight - White/Black
This is a lovely, stretchy cotton twill from Italy, by way of Avenue Montaigne, who uses it in trousers and jackets that sell in high end boutiques and stores. It will be an absolute go-to in your closet. It's got a great varied stripe pattern, with stretch to make it perfect for travel. Make a great pair of pants, a skirt, or a jacket.
The stretch runs from selvage to selvage, as do the stripes, so use a crosswise grain layout to take advantage (and have the stripes run vertically).