100% Cotton Twill - 5.5 oz - New Jersey Knows Flannel. It's Basically our Official Uniform. The Breaker Features Laser Engraved Buttons, Large Double Chest Pockets with "Otis Pillar," Custom Labeling at Neck , Inner-Pocket, and Chest Pocket - Side Seams Feature Scallop Shape with a Contrast Fabric Reinforcement - Available in Six Exclusive Colorways.