In this video I’m testing something that’s getting hyped a lot lately: alpaca wool insulation. Specifically, I put the Paka Apu Lightweight puffer through a couple real-life tests to see if it’s actually a legit alternative to synthetic insulation (oil-based, cheap, works when wet) and down (best warmth-to-weight, packs tiny, but expensive, annoying to wash, and… yeah… birds). Alpaca is interesting because it’s natural, harvested by shearing (no animal cruelty), and it’s supposed to be warm, odor resistant, and even thermo-regulating. I compared the Paka Apu (475 g, $279) against two down jackets: the Decathlon Forclaz MT100 (270 g) and the Outdoor Vitals NovaPro (390 g). After a mountain-top test and a “sit still in a cold hut with nothing underneath” test, I landed on this: warmth-wise, the alpaca jacket sits between those two down puffies, but closer to the warmest one—roughly like a 350 g down jacket. That’s where my “about 35% heavier than down” takeaway comes from. Then I did the wet test, and this is where marketing and reality split. The alpaca jacket didn’t clump like down, but it soaked up a lot of water and lost loft, and I got colder faster than with treated down. My conclusion: it’s a solid third option and I like it, but it won’t beat treated down in truly wet conditions.