As far as duability goes, the 120 lumens power-regulated LED light of this flashlight (which operates at six times the power of larger sized dual D cell battery flashlights) is designed to be virtually indestructible. The body of this flashlight is composed of aerospace aluminum, and is anodized. For further resistance to the elements, the O-ring of this flashlight is weatherproof, as is the gasket sealing. The coated tempered window of the SureFire 6P LED flashlight helps to resist impact, in addition to maximizing light output.