What’s Inside: Natural Down vs. Synthetic Fills
Down is the airy undercluster from geese or ducks, prized for loft and warmth-to-weight. Down alternative uses ultra-fine polyester microfibers or plant-forward blends to mimic loft. Tell us which origin matters to you—and why—so we can tailor future tips.
What’s Inside: Natural Down vs. Synthetic Fills
Down warmth is guided by fill power: higher numbers equal larger clusters, loftier feel, and better insulation. Alternatives rely on GSM and denier to estimate weight and drape. For custom builds, mixing fill levels per zone creates precision comfort. Subscribe for a deeper sizing guide.