Neutrino Pro Jacket

The Rab Neutrino Pro is a cold-weather workhorse, built for static use in serious conditions. It's not a jacket you'll be actively hiking in unless temperatures plummet well below freezing; its primary role is to provide maximum warmth when you're stationary, whether that's at a belay station, making camp, or glassing for wildlife in sub-zero temps. The 800 fill power European goose down, treated with Nikwax hydrophobic finish, maintains its loft better in damp conditions than untreated down, which is a significant advantage in mixed weather. The Pertex Quantum Pro outer fabric also sheds light moisture and offers decent wind resistance, helping to protect that critical insulation.

Construction is robust, as you'd expect from Rab. The stitched-through baffle design keeps the down evenly distributed, preventing cold spots and ensuring consistent warmth across the jacket. While stitched-through construction can theoretically allow for more heat loss than box-wall designs, in a jacket of this fill weight, it's a practical choice that reduces bulk and weight slightly while still delivering substantial warmth. The fit is generous enough to layer over other insulation, but not overly baggy, providing good thermal efficiency. The hood is helmet-compatible and easily adjustable, a must-have for climbers or anyone facing harsh winds.

This jacket sits firmly in the 'serious warmth' category without being an expedition-weight monster. It's a direct competitor to other high-fill-power down jackets from brands like Mountain Equipment or Feathered Friends, often offering a slightly better warmth-to-weight ratio for its class due to the efficient baffle design and premium down. Its durability, thanks to the Pertex Quantum Pro, means it can handle the occasional scrape or brush against rock without immediate concern, making it a reliable choice for cold, demanding environments where warmth is non-negotiable. Don't expect it to pack down to the size of a coffee mug, but for the warmth it provides, it's quite compressible.