The Tilley LTM8 – Nylamtium® with Mesh introduces the Lighterweight Mesh Hats, the newest generation of Tilley Hats. And it weighs only about 4 ounces! * GUARANTEED FOR LIFE * INSURED AGAINST LOSS * EXCELLENT SUN PROTECTION * REPELS RAIN * TIES ON IN THE WIND * MACHINE WASHABLE (WON`T SHRINK) Tilley lighterweight Mesh Hats are ideal for outdoor enthusiasts looking to keep their cool in a broader brimmed hat. This Hat is lightweight, breathable and comfortable because the crown is made of strong, unique ‘3-D’ polyester mesh which blocks sunlight, but allows air to pass easily. LTM8 has been engineered with a water-repellent, sun protection 3” mesh crown with a lighterweight Supplex® nylon brim. Designed to be very lightweight & breathable the Tilley Lighterweight Mesh Hats have been tested and certified as having a UPF 50+, the maximum UV protection rating given. The LTM8 Mesh Hat is styled with the broader brim size of the Tilley LTM6 model and T4 Cotton duck models. Brim Measurements: Front and Back: 3 1/4" Sides: 2 1/2" If you give us your head’s measurement (inches or centimetres) on the Sizing Guide on the website, we’ll give you the right size. Or refer to our Hat Sizing Chart for the easy reference to your Tilley Hat size.