Women's baseball hat is made of high-quality, skin-friendly, soft, quick-drying polyester fabrics, even if the hat is wet with sweat or light rain, it will dry quickly. Inner sweatband can effectively remove sweat from the eyes and face. Unique mesh structure allows for moisture and heat to easily escape these caps, which not only keeps you cool, but you’ll also stay dry. The inner circumference of this hat measures approximately 22 inches. With the adjustable strap at the back of the hat, it can adjust to measure anywhere between 20 and 22.8 inches, fitting several various head sizes. The hat brim width is 2.65 inches. Only 1.7 ounces, it's essential for hiking and running and won't make you feel heavy.