The "Bench Optimizer " is 8' long, 5" wide, approximately 2-1/4" tall, this ingot-shaped bag has many uses. It can be used as a forearm or elbow rest; it can be used to raise the height of the rear bag; it can be used between the buttstock and the shoulder with heavy recoil long guns; a heel rest for handgun shooting; even as an expedient front rest. Material: 5 oz. Top Grain Cowhide and Cordura Nylon. Dimensions: Width = 5", Length= 8", Height= 2.25". It will take approximately 2 lbs of media to fill this bag. Works well with Caldwell Rock Deluxe Front Rest as well as Wichita, Hoppes, Sinclair, Hoene's, SYG and most other mechanical front rests. Furnished empty to allow shooter to fill to their own preference.