The 2011 US Open Hat by Ahead Vintage is a classic white ball cap made of cotton, featuring an adjustable strap for a customized fit. This unisex adults' hat has a timeless design with a vintage look, making it a stylish accessory for any golf enthusiast or fan of the US Open. The classic cut and one size fit make it a versatile choice for anyone looking to add a touch of nostalgia to their golfing attire.