Comfortable hiking shoes should fit snugly but not very tightly.The comfort rule applies here as well: not too loose, not too tight. Your shoes should be snug enough to support your feet but not so tight that they’ll cause discomfort or pain.Remember that your feet are likely to swell when you hike, so leave some extra room for them. Also, when you hike downhill, your feet might slide forward in your shoes, and you don’t want them to be too loose or too tight as you walk.