Superior warmth for belays, bivouacs and extreme expeditions. This jacket fits over your hardshell for extra insulation and packs down so it can be ready for emergencies. Our industry-leading Mammut Wall baffle construction maximizes the performance of our 900-cuin-fill-power DRY DOWN filling. This combines with strategically placed down-filled tubes to boost heat retention and prevent cold spots. The 20D Pertex® Quantum Pro fabric with Diamond Fuse technology shields against wind, rain and abrasion. Tested by athletes in the harshest conditions, the Eiger Nordwand Advanced Down IN Hooded Jacket offers outstanding warmth.