Warm premium down with a fill power of 750+.* *Measured by the IDFB method. High-performance down with improved wind resistance and water-repellency. Seamless type design keeps warmth in. *Seams at the shoulders, sides, sleeve paneling, under the sleeves, sleeve attachment, pockets, and collar attachment. Our down is certified to the Responsible Down Standard (Certified by Control Union CU1323320MUL-2025-00060457)