OTTO CAP 5 Panel Mid Profile Mesh Back Trucker Hat, OTTO CAP's World Famous Trucker Hats, Key Product Features. Mid Profile - Our most popular profile, designed for a contoured fit Classic Trucker Style - Mesh design for a stylish, timeless look Polyester Pongee Fabric - Lightweight fabric with a soft, silky texture for everyday casual wear Mesh Back - Provides enhanced airflow and breathability Plastic Snap - Premium durable closure for a secure fit and easy adjustment Micro Mesh Standard Performance Sweatband - Moisture wicking technology for dry, all-day comfort