Skull Cap Biker Caps Headwraps Doo Rags - Route 66 Made in USA Made in the U.S.A. / Free Shipping 100% Cotton Breathable Fabrics and one size cap fits most people. Super absorbent 100% Cotton Terrycloth Sweatband Our Skull Caps tie in the back and have a super absorbent terrycloth sweatband. No more sweat stains in the front or sweat in your eyes. As a 25 year old American manufacturing company, we make all of our skull caps in sunny Phoenix, Arizona. We have great quality and customer service.