Compressed HEX foam side panels promote cooling and air flow SAS-TEC foam spine insert is lightweight and flexible Corrugated exterior shell Universal T-nut and screw attachment system Add to your lower back protection by attaching the Gear Pro-Tec Razor Football Back Plate - 9.5" x 6" to your shoulder pads. A smaller back plate built for players requiring narrower protection, this pad features some of the same cutting edge technology found in the Razor shoulder pads. The compressed HEX foam side panels and SAS-TEC foam spine work together to provide maximum protection, while a corrugated exterior adds strength. Attaches to Razor, Z-Cool and most other shoulder pads with universal T-nut and screw attachment.