Superior warmth for belaying, bivouacs, and extreme expeditions. This jacket fits over your hardshell for additional insulation and packs down so you can be ready for emergencies. Our industry-leading Mammut baffle construction maximizes the performance of our 900 cuin-filling DRY DOWN. This is combined with strategically placed down-filled tubes to increase heat retention and prevent cold spots. The 20D Pertex Quantum Pro fabric with Diamond Fuse technology protects against wind, rain, and abrasion. Tested by athletes in the harshest conditions, the Eiger Nordwand Advanced Down IN hooded jacket offers exceptional warmth.