Thank you for viewing. We will ship anonymously. Instant purchase is welcome. 2-piece set Simply insert it inside your hat for comfort. Recommended for heatstroke prevention. Heatstroke prevention goods for club activities such as baseball and soccer, and for commuting to school. ★Please check the instructions on the back of the package before use. Material: Special aluminum composite material / Non-woven fabric containing silica gel / Acrylic adhesive Size: 250 x 145 Contents: 1 piece For hats Made in Japan