When sourcing a cooler pad system (evaporative cooling pads), the most critical factor is the evaporative efficiency, which should ideally be above 80%. You must specify the flute angle (commonly 45/45 or 70/30 degrees) to optimize airflow and water contact. Ensure the material is high-quality cellulose paper treated with anti-rot and wetting agents to prevent algae growth and structural collapse. For long-term durability, verify the dry weight vs. wet weight ratio to ensure the pads can handle water saturation without sagging.