A survival knife is a vital tool for outdoor adventures, and the top 5 essential features ensure reliability. First, a full-tang blade offers strength and durability. Second, high-quality stainless or carbon steel ensures sharpness and longevity. Third, a comfortable, non-slip handle provides a secure grip. Fourth, a versatile blade edge, both straight and serrated, adds utility. Finally, a sturdy sheath allows safe carrying. Together, these features make a survival knife indispensable for camping, hiking, or emergency situations.