Our FGX Nightshade blades made from Griv-Ex the latest in fiberglass reinforced plastic our FGX Nightshade series knives are UV and heat stabilized to make them incredibly durable. The blades are unaffected by moisture. They never rust, warp, crack or split even in the most challenging environments. They are light enough to be tied, tucked or taped just about anywhere and since they are unaffected by all but the most extreme heat and cold, they are a natural choice for concealed storage both inside and outside of your house. The handles of these knives are made from deeply checkered Kray-Ex that's molded directly onto the blade tangs. This offers a slightly tacky-feeling textured surface that will give you a decisive and secure grip whatever the weather.