Usually, the shell of the helmet is made of high-strength materials, such as metal, engineering plastics, Kevlar fiber, etc., through its deformation to absorb most of the impact; the lining material has the ability to absorb sweat, keep warm, and absorb shock. Military helmets often have the functi

Your climbing helmet has been with you through countless adventures. It's protected you from falling debris, bumped against rock faces, and sat in your gear bag through scorching summers and freezing winters. But here's a question many climbers overlook: when should you retire it?

You are packing your gear for a weekend at the crag, and then you look over at your work bag for Monday morning. It creates a tempting scenario. Why buy two separate pieces of safety equipment when one sturdy shell seems like it could do both jobs? After all, a helmet is just a plastic bucket designed to protect your head, right?

Standing at the base of a cliff, staring up at a multi-pitch route, the last thing you want to worry about is your gear. You check your knot, double-back your harness, and count your quickdraws. But what about the piece of gear protecting your most vital asset?