Peter, I meant an elastic drawcord. If the cord is loose the material folds/slides down over time. If it's tight then when I take a large step/scrable/etc my trousers pull through then the top of the gaiter is at a lower heigh on my trousers after the step/scramble/etc. I'll experiment a little more if others don't have a problem. Might try attaching some velcro myself.