Spot on with the Outdoor Gear Lab abrasion data-that 500-mile sim is brutal, and it levels the playing field across genders. On the multi-year front, I finally tracked down some solid longitudinal stuff from the Pacific Crest Trail A-List Facebook group (they aggregate gear teardowns). Over 5 years of thru-hiker reports on 100+ packs (Osprey Atmos/Aether men’s vs. Aura women’s, etc.), failure rates were <2% difference, mostly from user error like overpacking or poor strap tension, not fabric toughness. The “rugged men’s” denier bump (e.g., 210D vs. 100D nylon) adds 20-50g weight with negligible tear strength gains per ASTM D5034 tests.
Where it gets interesting is biomechanics: a 2019 US Army Natick study on load carriage (n=48 hikers, mixed gender) showed women’s narrower Q-angle (hip-knee alignment) benefits from flared hip belts (5-10cm lower placement), distributing 20% more weight off shoulders vs. men’s straight-drop designs. Men’s wider biacromial width shines in suspended packs over 40L, but slimmer guys swear by XS women’s for better wrap. Cost-wise, that “premium” is 10-15% markup per REI pricing analysis-no functional ROI unless the fit’s dialed.
My tweak: measure your torso length/hip circumference first (Osprey’s online tool is gold), then demo with a 25lb load. Who’s run gender-swap packs on JMT or similar? Any chafe disasters or wins?