Yes, long bath towels can be suitable for use in humid environments, but it's important to choose towels with quick-drying properties to prevent mold and mildew growth. Towels made from lightweight materials or those with a lower GSM (grams per square meter) dry faster than heavier options. Additionally, towels made from materials like Turkish or Egyptian cotton, which have long fibers, can also help in quicker drying due to their absorbent yet breathable nature. After use, hang the towels in a well-ventilated area to ensure they dry thoroughly between uses.