Sack-Up SU100 Gray Camo 52" Silicone Treated Rifle/Shotgun Sock Sack Ups  are Silicone treated to prevent rust and to wick moisture away from your firearm. They provide protection for your firearm in the field or in storage and prevent dings and scratches. Keeps your firearm looking as new as it did the day that you bought it. New without package.