The UPR Air Seat Cover is made with durable 5mm thick AMB Air-Mesh High-Flow Fabric that will promote airflow between your body and seat to help wick heat and moisture. The UPR Seat Pad Cover has a gripping effect that will keep you from sliding around in a debris filled seat. The more you move in your seat, the more energy you exert trying to stabilize and reposition yourself with your arms and legs.