Montbell’s O.D. Vent Hat is a sun hat that is lightweight and provides excellent ventilation and moisture transfer.Montbell says:Side mesh ventilation panels provide breathability, keeping you cool and comfortable. The crown and brim utilize a fabric with a cotton-like texture.Our VerdictMontbell’s O.D. Vent Hat is a lightweight, highly breathable sun hat perfect for active outdoor use. Weighing just 51-61g, depending on size, it provides excellent ventilation and moisture transfer without compromising sun protection.The clever design uses side mesh panels to promote airflow and release heat, while the crown and brim incorporate a quick-drying fabric that feels soft and cotton-like against the skin.- Reviewed by Ultralight Outdoor Gear(Unfortunately, we are unable to ship MontBell products outside of the UK)FeaturesQuick-drying fabric provides comfort during outdoor activitiesSide mesh ventilation panels provide breathabilityLoops for attaching hat strap (hat strap not included)SpecificationsSmall weighs: 51gMedium weighs: 58gLarge weighs: 59gXLarge weighs: 61gMaterial & Construction70-denier full dull spun-like nylon tussar (water repellent finish)

Montbell’s O.D. Vent Hat is a sun hat that is lightweight and provides excellent ventilation and moisture transfer.Montbell says:Side mesh ventilation panels provide breathability, keeping you cool and comfortabl