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 storm drains 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 Nylon for ultimate puncture-resistance. We add PVC reinforced pouch bases and reinforced bindings to make sure it lasts. Heavy gauge 6-ply nylon stitching and nickelplated rivets keep it hanging together. Finally, nickel-plated storm drains keep your tools aired out and dry.