(TrendHunter.com) The Polo Ralph Lauren x MLB x New Era RC 9FIFTY collection is a three-way headwear collaboration that reworks a classic baseball cap silhouette through heritage branding and premium materials. The…(TrendHunter.com) The Polo Ralph Lauren x MLB x New Era RC 9FIFTY collection is a three-way headwear collaboration that reworks a classic baseball cap silhouette through heritage branding and premium materials. The…