Used these for the last 5 or 6 years, i think they were originally meant as barefoot runners, very, very light, also very secure in fast water, you can roll them up, hang them off, or just ram them inside your bergan, they dont need drying out either.
Looks like they've changed the design a wee bit since I got them, mine came with a neoprene removable sock (which can be worn independently if desired, I don't really use them), they work ok as a camp shoe too. I wouldn't pay full price mind, i paid 20/25 quid in the sales
https://www.vivobarefoot.com/uk/mens/off-road/ultra-3-plus-mens?colour=Navy