Flexfit Delta® 180 Flexfit Delta® carbon cap The carbon collection presents a whole new array of color options on our most innovative Flexfit Delta® cap. It's fortified with carbon fiber-like grid for stretchability and durability while featuring the same revolutionary no-seam construction and stain-block technology. Match it with any style and performance with its groundbreaking technology and sleek, polished look. Lighter, sleeker, smarter cap for performance Hard buckram. Structured Closed back. Stretch fitted Black underbill, 1-row stitching on bill