Yupoong brand caps originated in 1995 and only sold by Thomas C Promotions who was the manufacturer with factories in Dominican Republic and Korea. They created the first ever stretch to fit Flexfit cap style 6677 in the industry and no other brand compares. The hat was such a huge success that they changed their name to Flexfit. No other manufactured was allowed to copy the patented style. Since then other cap manufactured have changed the way the cap stretches to get past the patenting law, but Flexfit is still the BEST ever fitting Flexfit cap. Most of the adjustable trucker hats and snap back baseball caps are going under the name YP classics. YP classic has some of the best selling wholesale styles in the headwear industry, trucker caps, and golf caps styles like 6006 and 6606 are a few of the best selling wholesale caps that CAPwholesalers offers. We offer the entire line of Yupoong, YP Classic, and wholesale Flexfit hats online. Shop our selection of wholesale Yupoong caps.