Montbell Stretch OD Mesh HatThe Stretch O. D. Mesh Hat is the ultimate high ventilation headwear for trekking, gardening, or tropical exploration. Combining a classic full brim silhouette with side mesh panels, this hat is engineered to prevent heat exhaustion by allowing constant airflow across the head. Unlike rigid traditional hats, this model features Montbells signature 2 way stretch fabric, ensuring it stays secure and comfortable even during long days of active movement