Ultra light weight is one thing, foot protection is quite another. If the foot protection is there these are a good option. If not, beware. Unlike camp shoes which only have to be comfortable, river and stream crossings require actual foot protection. When I backpacked the Escalante River in Utah we crossed and recrossed the river repeatedly. The water was so turbid that there was no way to see the bottom or know when you might step into a hole. We always unhooked our hip belts when in the river, and on that trip I used a cheap pair of Nike boots that were throwaway for the trip. I would have loved to have had the Crocs on that trip but had never heard of them. I think my camp shoes on that trip were Nike water shoes that I wear around the pool and into the water. No foot protection though. Anything sharp would have gone right through the stretchy fabric. YMMV!