The 3 piece shooting stabilizer gives you the confidence of a secure shot. While most kits only provide a front and rear bag, Norma Precision wanted to ensure you had the best. By providing the middle rest you now have three points of contact with your firearm for precision accuracy. These bags come unfilled to keep costs down on shipping. The easy pour spouts are wide and seal tight with Velcro and tuck away in the securing strap. The bags are made of 1000d Cordura material for extreme durability and water resistant. The velvet resting pads on back and middle bags provide extra protection for the stock of the gun. The back rest is equipped with 6 shell holders, convenient for your Norma Precision centerfire ammunition.