Mora knives are intended for use all year round in a north European (semi-tropical to subzero) enviroment. Most chrome blades will become brittle at the bottom end of this temperature range. Unlike carbon steel. They are also a "cheap" knife. Unlike most cheaper knives they perform very well. However they will rust and cannot be abused. Not that you should be using your knife as a prybar anyway. I use them, I like them & bearing in mind their limitations I would choose one or more for a survival kit over many so called better knives . Best way to protect the blade is to apply a light coat of dry anti-rust lubricant or vasaline.