Birkenstock Gizeh EVA Sandals
I have the Birkenstock Gizeh EVA sandals in an olive green color and love them. The EVA means they are plastic, so can be worn by the pool or at the beach. I love that they have the support of a regular Birkenstock, but are much lighter.
From the Amazon description:
The heart of all models is the original BIRKENSTOCK footbed. The construction, which has been thought out to the smallest detail and makes it feel like you’re standing in sand, helps your feet feel as comfortable as possible for hours on end. This supports health and promotes wellbeing.