Most of the men (all?) have military training -- they had boots and clothes for that. Depending on their training, maybe knives, compasses, detailed top maps, ponchos, canteens (and the metal cups), fire starting equipment, etc. Military survival training isn't like surviving naked. The mental aspect, sure, but not necessarily the practical. The men went in overconfident. The men have mostly been... not as good as the women. The sunburned guy in Panama. Really? How dumb are you? When I was in Panama, I slathered my tanned native American skin with spf 30 and I still burned when out in the sun all day. Sun burn can be crippling and even fatal in a tropical environment if the blisters pop and get infected.