The Odin Stretch by Helly Hansen integrates Primaloft Gold Active insulation, an elastic but warm synthetic insulation, to improve mobility without sacrificing durability or thermal performance. This is my review: As alluded to above, the Odin Stretch is built around 80 grams of Primaloft Gold Active insulation. This synthetic insulation is compressible, warm, quick drying, … More Helly Hansen Odin Stretch Insulator Review