High Octane, Pro-Level Performance. The PL Series has Super Fit and Breathability and is completely customizable. Pro Gear uses sophisticated “Air Management” patented technology which combines Poron SRS Foam in the shoulder area and under the epaulet (Flap). Patent# 10,376,001. The PL Series has a very low profile fit with Pro Gears “Performance Stitching which contours to the wearers shoulder slope. The Pro Gear PL Series is widely worn throughout the NFL and by many colleges and universities as well as high schools throughout the USA.