Veroda Summer Block Sport Sweat Hat Outdoor Activity Quick-Dry Hat Circ.: 52cm/20.5"(fully adjustable); Brim Width: 6.7cm/2.6" Material: Polyester Use of sweat on mesh material through the steam on both sides can help better heat dissipation and moisture wicking Flexible elasticity Material back of the head brings no harm to your head Hat with a high temperature above 203 degrees Celsius Italian transfer ink to ensure the colorful, never fade