FGX Nightshade 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 - from hedges and flowerpots, to the refrigerator or the shower!