Every few years I buy a pair of rainbows. They are a staple in my closet. The usually last over 5 years. Once they look more tattered (3years in) I make the beach/pool sandals and buy a new pair. I wear them pretty much daily living in California.
I had a pair of these ten years ago and they were awesome ! I bought 2 pairs this time and both were so uncomfortable at the toe strap you could not walk in them ! I boiled them in hot water ! Put them in the wash, put coconut oil on them and they still were horrible ! This company obviously changed the quality of materials. 50 bucks a pair ? Buy a cheap pair from LL bean !