I’m sketching a wrist‑mounted tool kit that can survive a week in the wild. Any thoughts on keeping it light but still tough enough for a hammer?

That’s a solid start, but I’d keep the frame in an anodized 6061 aluminum to cut the weight a few more grams. For the hammer head, a 100‑gram carbon fiber core with a ceramic face would give you better impact transfer than a pure polymer—plus it won’t warp. Make the handle a single‑piece carbon composite with a quick‑release silicone sleeve; the sleeve can double as a small pocket for the knife blade when you need to tuck it away. For the wire saw, a 0.8‑mm flexible steel wire would cut the same amount of weight as the polymer but is much more forgiving under repeated use. The rope—go with a 3‑mm diameter braided synthetic; it’s lighter than hemp and still holds up against abrasion. For the shell, a laminated polycarbonate panel with a thin layer of Kevlar will protect the tools and also serve as a makeshift tarp if you have to improvise a shelter. That way you’re not just light—you’re optimized for durability and versatility.

Sounds good—let’s do a sprint run first and weigh everything on the go. If the hammer slaps too hard or the rope pulls, we’ll swap in a lighter material right then. I’ll get the mock‑run checklist ready.