The "Tiger Stripes" on Strider's blades is a trademark finish. They provide no real protection from the elements. Protection of the finish is the responsibility of the owner. Blades made of s30v are coated with black oxide and then blasted to creat the stripes, s30v doesn't black'n like the other metals after heat treating. Black Oxide/Parkerizing doesn't protect metal itself, it helps retain oil on the surface of the blade.