Based on exactly where your lodge/resort is located and what year you visit, mosquitos may very well be an issue. If mosquitos can be an issue, pack 1-2 light-weight long sleeves (or bring some bug repellent spray with you). Being aware of what to pack for Cancún can experience too https://damienlruxa.blogs100.com/32340919/what-does-what-not-to-bring-to-cancun-mean