Any of our UltraGrip models! UltraGrip is waterproof, and also dries quickly. For heavy water activities, we definitely recommend UltraGrip.Our leathers do ok in rain and with sweaty feet, etc. However, no leather really loves water. In very wet conditions where the leather becomes soaked, the leather will become slippery until it dries out again. For the most part it handles well unless it's soaked.In both cases, we also recommend getting Power Straps if you're planning on swimming, river crossings, and other conditions where you're fully submerged.