Yes, there are breathable hay cover options available that allow air to circulate while still protecting hay from moisture and sunlight. These covers are typically made from materials like woven fabrics or mesh that are designed to block rain and UV rays but permit airflow, preventing condensation and reducing the risk of mold growth.
Breathable covers are especially useful in climates with high humidity, as they help maintain a dry environment around the hay. These covers balance protection with ventilation, making them an effective option for preserving hay quality over time. Another option is to have hay covers fabricated with mesh patches inserted under flaps cut in the cover material.