The CrossTac XXL Rear Squeeze Shooting Rest Bag is made of 100% grip material, with two added web loops for using the bag laying on its side or on the end, and a carabiner for overall hardiness. Perfect for heavier rifles, just a 50 calibers, you name it! The Rest Bag is filled with CrossTac's poly fill which is also used in their standard Tactical Rear Squeeze Bags.