Allen Company Thermoblock Front and Rear Bag Set Filled Withstands 400 F Grip area on top and Bottom Allen Company Front and Rear Precision Filled Bags Used Together as a Complete Shooting System that is Rock-solid on the Bench. With todays shooter as likely to own a Bolt action rifle as a MSR. The standard Bags where not designed to take the heat generated by rapid fire from the MSR of todays shooters since they did not need to for the older bolt action guns. Now Allen Company offers the ThermoBlock Shooting Bags-with built in heat-shield and 2x thicker ballistic woven fabric. Made of heat resistant tough woven material no matter what you and your MSR want to do these are made to take up to 400 degree temperatures. The ThermoBlock family of filled shooting bags are setting the new standard by combining heat forge-proof temperature shields with excessively tough woven fabric exteriors. Specifications and Features: Allen 18494 Thermoblock Front And Rear Bag Set Filled A Nomex-type heat shield, these bags can stand the 400F temperatures Constructed of heavy-duty, cross-woven fabric that is literally 2x thicker than the competition To ensure a secure footing on many surfaces, these bags have a rubber traction plate bonded to their bottom surface To improve forend grip properties, a small silicone surface is strategically placed in key holding areas Product Comes Filled Rugged Endura Fabric Exterior Color Black and Gray