I’ve been ultralight hiking for 15 years across the Rockies and Sierras, and the “pack light but stay safe” mantra gets thrown around like gospel, but most lists are either reckless minimalist fantasies or bloated “just in case” excuses. Let’s cut through the BS with evidence-based debate-what’s your sub-5kg base weight kit that actually holds up in multi-day rain, cold snaps below freezing, or unplanned bivy nights?
Challenge: Folks swear by tyvek groundsheets (under 100g) over polycryo, but I’ve seen tyvek shred on granite in storms while polycryo survives-anyone got abrasion test data or trip reports proving otherwise? And emergency shelters: Plume Gig Shelter at 200g vs a full silnylon tarp at 400g. The tarp wins for wind/rain every time in my logs, but ultralighters claim the plume’s enough. Show me the stats on hypothermia incidents with plume-style bivies (NOLS or Hypothermia Prevention data?).
Water: Sawyer Squeeze (85g) is king, but filters clog fast in glacial silt-prove me wrong with filter lifespan logs from buggy or turbid streams. No logs? Stick to chemical tabs + prefilter.
First aid/navigation: Ditch the sat comm? I’ve pulled coordinates from friends’ Garmin inbounds twice-your “phone + spot” argument needs real-world battery drain numbers in -10C.
Post your exact kit weights, conditions tested (temps, precip, terrain), and any failure stories. No vague “it works for me”-evidence or GTFO. What’s your lightest safe setup that I’d bet my life on?