OTTO CAP 5 Panel Mid Profile Baseball Cap, Sporty Style for the Outdoors, Sports Teams, and Corporate Uniforms!, Key Product Features. Mid Profile - Our most popular profile, designed for a contoured fit Polyester Pongee Fabric - Smooth, lightweight material with a refined finish Laser-Perforated Back - Water-drop perforations maximize ventilation for superior cooling Premium Interior - Branded OTTO buckram lining TPU Snapback - Premium closure with softer, flexible design for all-day wear Micro Mesh Standard Performance Sweatband - Moisture wicking technology for dry, all-day comfort