Built from the same stuff that used to make police vests bullet-proof, they don"t just push the envelope, they tear the traditional standards for quality a new one. From corrosion-resistant nickel-plated hardware right down to their heavy gauge 6-ply nylon stitched soul, you can be damn sure you"re strapping on strength built to last. 1680D Ballistic Polyester for ultimate wear and puncture-resistance.