OTTO CAP 6 Panel Mid Profile Baseball Cap, A Favorite for Professional Athletes!, Key Product Features. Mid Profile - Our most popular profile, designed for a contoured fit All-Day Comfort - Sporty style that works on and off the field Polyester Pongee Fabric - Lightweight fabric with a soft, silky texture for everyday casual wear Laser-Perforated Back - Circle perforations maximize ventilation for superior cooling Hook Loop Closure - Quick and easy adjustment for a secure, comfortable fit Cool Comfort Standard Performance Sweatband - Antibacterial, anti-odor and moisture wicking properties