Winter Pants Insulation: Down vs PrimaLoft & Layering Guide
Compare down (60-80g/m² warmth-to-weight) vs PrimaLoft synthetic insulation, plus when insulated vs shell pants work best. Build your winter layering system.

Compare down (60-80g/m² warmth-to-weight) vs PrimaLoft synthetic insulation, plus when insulated vs shell pants work best. Build your winter layering system.

Picking between down and synthetic insulation for backpacking isn’t straightforward—one critical factor could completely change your choice.