Running in the Ibex Izzi pants: not recommended!! I did that today and tripped by catching my toe on the bottom of the opposite pant leg b/c the pants are flared. At least this happened on wood chips in the park rather than on the pavement or on a rocky trail, so it was a soft landing (plus I wasn't going that fast). The pants are comfy and great for general everyday wear, but not so much for running (or am I just a klutz?).