Buckle. Had a Scott with the velcro and after a couple of years the velcro got worn and the strap would pop off just as I would hit the stiffest part of the draw cycle. Switched to a buckle after that.Makes perfect sense that the velcro will wear out asyou are using the exact same spot every time.

I don't like climbing with mine either, always banging off the tree steps as was metioned. Stays in my fanny pack until I'm in the tree.