The ShieldPro Extreme is the new standard Mylar bag in America, with superior protection and great tensile strength.    The ShieldPro Extreme line of 5 mil bags offer near-perfect oxygen, moisture and light barrier protection.  In our most popular kits, we offer it in conjuction with 300cc oxygen absorbers.  Kits come in sets of 20 and 50 and you can order them pre-kitted in our Kit Section.