WATER CONTACT
With your sailing rope bracelet you can swim in the sea and take a shower every day, because sailing rope is made for water: it dries quickly, is UV-resistant and keeps its colour.
On the other hand, your leather wristband doesn't like water very much - nor does it like too much sweat. Therefore, it is best to take it off when showering, sleeping and during strenuous activities. If it does get wet, you can simply leave it to dry at room temperature.