These are a super cool and versatile sandal. They're ultralight (M's size 9 is just 4.6 oz / 130 g) and low profile, so they stash away easily in your pack with adding too much weight. A perfect camp or zero day sandal for the PCT or JMT. The sole is thin for a barefoot feel, but keeps your feet comfortable with a layer of soft rubber under the forefoot. Plus, these shoes float so you don't lose them while swimming.