I've been a jambu (j41) shoe fan for a while, and have bought anything from sandals to boots from the brand over the years. The parts are made of mostly recycled Jeep parts (rubber). The comfort of this shoe is unlike any other shoe brand I've purchased, no need to break them in. This shoe is versatile, go into the water with them, wear them casually, or go for a hike. They tend to run a bit big, at least on my foot, I suggest a 1/2 size smaller. It is an absolute must-buy for those who cherish versatility & comfort.