10mm Dual Density Padding: provides a tough layer of protection against impact. Heavy Duty Polyester Skin: heavy duty outer layer for added protection. Padded Rail Protection: internal layer of protection along the zipper path helps to prevent rail damage. Contoured Coffin Wall: matches surfboard rocker and adds additional strength. Ergonomic Shoulder Pad: double layered and vented to provide the ultimate in comfort and support. Airflow System: reduces internal heat, removes moisture, and maintains dryer internal compartments. Padded Internal Separation Sheet and Strap: separates and secures the boards in the cover. Internal Pocket: additional storage for wax, leashes, tie down straps and fins. FCS Premium Tie Down Straps: set of FCS Premium straps included to secure your board to roof racks.