these are awesome.
birkenstocks might be the most comfortable sandals out there, but i always had a problem with the leather lining making my feet feel too warm and therefore not being beach appropriate.
these are cheap, lightweight, washable and just as comfy as the original ones, if not more (the foam is soft).
and i love that they are monochrome. once again i wasn't a fan of the brown leather inner.
now i can walk up and down the mountain without getting blisters or ruining my leather sandals!