Very rushed & poor safety measures - The trip felt very rushed and unorganized. We only had one guide bringing us through the cave cenote, and there were people being nearly left behind in the dark because he was going too fast and not waiting for everyone to be caught up. There were two guests that were not good swimmers, and had life vests that did not fit them right at all ( no one made sure everyone had the correct size and weight limit for their vest), they nearly drowned in the back while the guide was way ahead. There was no one there to help them as they were literally shouting “help me!” and struggling to keep their heads above the water. They were truly panicking and nearly pulling other guest under trying to save themselves. Luckily they were helped by other guests and brought back to the starting point, but the guide was no help at all and never went back to check on/apologize to the two men that almost drowned.