Lightweight Supplex® nylon fabric is soft, dries fast and packs small; easy care Custom adjustment cinch on crown and non-chafing chin strap with soft-lock adjustment secure for surfing and tuck away when not in use Circular brim protects ears and neck; ventilation holes; reinforced front brim retains shape when wet Size range adjusted 4-ply, 4.2-oz Supplex nylon with a DWR (durable water repellent) finish