Comfort is critical. Gun Mount involves a lot of arm movements, so wear loose fitting comfortable clothing that is weather appropriate and doesn't restrict shoulders and arms. Jeans and a tee shirt are perfect in the summer. During cooler weather a collarless sweat shirt is a good idea. Heavy collars can inhibit gun mount efforts. Definitely wear shoes that are appropriate for walking outside on gravel, in the woods or a grassy field. I recommend hiking and walking shoes with a solid flat base.