The Bislett Pants are constructed from an innovative Swiss-made, four-way stretch dryskin fabric. The result is a running pant that performs like your favorite tights. They're moisture wicking, abrasion resistant and water-repelling. Stirrups can be worn up or down. Tried once. These didn’t work for me as a running pant (I’m a tights girl) but the color and amazing stretch soft-shell-like fabric is almost worth keeping these as casual pants. A note about sizing: I consistently wear a Medium in all Tracksmith bottoms. But in these I absolutely needed to size down.