Poly stretch and non-stretch chassis material construction for the comfort you want and durability you need Laser cut perforation vents for increased airflow Moisture wicking inner Poly mesh liner keeps the body cool and dry Mesh paneling at lower legs for body heat to escape Sticky silicone printed inner waist keeps jersey in place Precision-fit, ratchet waist closure system with additional side hip adjusters Durable full grain leather inner knee grip panels