The down fill is "H Down Platinum", with a fill power of an impressive 850 and treated to resist moisture. In tests, it has remained dry for 10,000 minutes in wet conditions. Additionally, synthetic Mimic insulation fiber is used in areas that undergo the most demanding use. The amount of insulation is sufficient for even extreme cold, and the jacket is designed to protect you in the harshest snowstorms. - Relaxed fit: provides good freedom of movement, with room for a thick mid-layer if needed - Reinforced shoulders - Helmet-compatible hood - Two-way main zipper - Two lower pockets, two storage pockets, one chest pocket, one inner mesh pocket - Elastic cuffs - Adjustable hem cord - Back length in size L is 87 cm All fabrics and insulation are bluesign-certified. The product is free of PFAS compounds.