Sometime back, My scouts and I had a long discussion on the
merits between sandals and trackshoes for outdoor activities.
While for obvious hygene reasons, sandals are good to allow the
feet to breathe and if the quality is good, offer sufficiently
similar traction, there is the problem of arch support and heel
grip.
I have always advocated overall coverage, protection of the upper
half of your foot especially in event anything falls onto your
foot.
Can't imagine pounding the 2.4 in sandals, no impact absorbtion or
archillies tendon support. Whoever is suggesting sandals must have
forgotten that the army runs in its PT shoes and not just for
loping around looking cool.