Baseball Cap With Solar Fan Material:at your requested Color:PMS color code Solar Cell: ... Poly Silicon,0.18W Revolution:2400/m Solar Fan CapYC-SC3103MATERIAL: 100% cotton twill or jean,nylon,polyester......BACK ... WILL START WORK AND DRIVE THE FAN,YOU WILL FEEL THE COOL WIND FROM THE FAN.SOLR FAN CAP ,SOLAR COOLING CAP,BASEBALL ...