Coir mats are incredibly durable and can withstand a certain amount of moisture. However, to prolong their lifespan, avoiding exposure to excessive moisture is advisable. Coir is a completely natural material and will rot if it is left wet for too long. If a coir mat becomes very wet, hanging it up to dry thoroughly is recommended. This care prevents mildew or mould development and maintains the integrity of the mat. Ideally, place coir mats in sheltered outdoor areas or opt for indoor use for the best results.