This lighterweight (4 oz. ) version of the T3 Tilley Hat has a medium-sized brim that snaps up in the Aussie manner. Made from Tilley Nylamtium , a durable, water-repellent nylon. A new innovation lets you secure your sunglasses through the grommets and have them securely held in place with a hidden Velcro tab. Stylish, easy to care for, and packs small yet springs back to life, always looking great. - Brim Measurements: Front and Back: 2 3/4 Sides: 2 3/8