With almost 100% humidity you will probably sweat more than you ever have in your life. Since I was trying to go to the gym or play soccer as much as I could I found out that I will need a lot more sports clothing. I went into Second Hand Shops and found some good quality tank tops and shirts for a very cheap price and have been using them since. In Uvita you can find 2 Second Hand Shops around the corner of the Supermercado Pacifico (Yellow Supermarket) and next to the Uvita gym.