No. If you have wool or synthetic long underwear, that can help on colder days. We have splash tops and pants, and we have wet suits if need be. But towards the end of June through July, which is when we have most of our trips, it’s hot out and the water gets warm as well, so swim gear is usually fine. We do ask that you don’t wear open-toe shoes, as they can be dangerous, during the rafting portion of the experience. You can wear sneakers or booties, or use ours.