What Our Gearhead(R) Experts Are Saying:"When I'm heading into deep winter or alpine terrain, the Neutrino Pro Hoodie is the piece I trust. It's super warm for its weight, packs down easily, and sheds snow like a champ thanks to the Pertex(R) Quantum Pro shell."When the mountains demand everything we've got, we turn to dependable warmth we can count on. The Rab Neutrino Pro Hoodie delivers expedition-level performance in a trim, highly packable profile. Stuffed with high-loft 800-fill European goose down and wrapped in weather-resistant Pertex(R) Quantum Pro, this alpine essential is made for winter belays, summit pushes, and frozen bivvies. A fully adjustable helmet-compatible hood and dual-adjust hem seal in heat, while high-set hand pockets, an internal stash pocket, and a two-way YKK(R) VISLON(R) zip make it adaptable to ropework and layering systems. Built for vertical living, it thrives in the most inhospitable conditions with surprising comfort and mobility.