* GUARANTEED FOR LIFE * INSURED AGAINST LOSS * WATERPROOF * SECRET POCKET * TIES ON IN THE WIND * EXCELLENT SUN PROTECTION NEW for Spring - Introducing the TWP1 Tilley Waterproof Hat. And it weighs only 4.2 ounces! Raindrops aren't falling on my head! Not only are all the seams sealed, but the exterior Nylon is laminated with a waterproof backing, making this Hat a superb rain stopper. For those days when the weather is a mite unpredictable, a zipper venting system allows for maximum airflow between downpours. When the rain eases, the YYK™ zipper vent allows air to circulate throughout the mesh interior for coolness and comfort. A 3M Scotchlite™ reflective hatband, zipper pull and wind cord make the Waterproof Hat more visible in heavy precipitation or at dawn, dusk or nighttime. An interior size adjuster ensures a custom fit. And if all that wasn't enough, it provides maximum sun protection as well, rated at an "EXCELLENT" UPF 50+, the maximum rating given. Brim Measurements: Front and Back: 3 1/8" Sides: 2 3/8" SIZES: S (6 7/8 – 7) M (7 1/8 – 7 1/4) L (7 3/8 – 7 1/2) XL (7 5/8 - 7 3/4) 2XL (7 7/8 - 8)