REI Co-op Magma 850 Down Hoodie - Women's vs Rab Men's Neutrino Pro Down Jacket

Warmth is critical for hiking jackets, as it determines how well you retain body heat in cold, windy, or damp conditions. A jacket that performs here keeps you safe and comfortable without needing bulky layers. Both jackets deliver outstanding warmth: the Magma 850’s 850-fill down earns praise for being incredibly warm and efficient for its weight, while the Neutrino Pro’s 800-fill hydrophobic down maintains insulation even in damp or snowy environments. Buyers of both report staying warm in sub-freezing temperatures, with the Neutrino Pro slightly edging out due to more consistent feedback on performance in wet conditions and better overall heat retention around the head and neck. For most hikers, the difference is negligible, making this a clear tie.

Fit affects comfort, layering potential, and mobility on the trail. A jacket that’s too tight restricts movement; one that’s too loose lets in cold air. The Magma 850 has a slim, form-fitting cut that many appreciate for its sleek look, but several users report it feels restrictive in the shoulders and limits range of motion during climbing or reaching. In contrast, the Neutrino Pro features a regular athletic fit with articulated arms and a helmet-compatible hood, allowing ample room for midlayers without bulk. Buyers consistently note its snug yet non-restrictive feel around the face and wrists, with adjustable hem and cuffs for customized fit. For hikers who layer frequently or need freedom of movement, the Neutrino Pro’s superior fit makes it the clear winner.

Durability determines how well a jacket withstands abrasion, wind, light precipitation, and repeated use on rocky or brushy trails. The Magma 850’s recycled ripstop nylon with a DWR finish holds up well for casual use, with users noting it resists moisture and feels sturdy. But the Neutrino Pro’s Pertex Quantum Pro ripstop nylon shell—rated at 20 denier with a PFC-free DWR coating—is explicitly engineered for rugged terrain, offering superior resistance to wind, water, and abrasion. Buyers highlight its ability to handle rough surfaces and long-term use without showing wear, making it a more dependable choice for serious hikers. While the Magma is adequate, the Neutrino Pro’s construction is in a different league, giving it a decisive edge in durability.

Comfort encompasses softness, weight, wind protection, and how the jacket feels during extended wear. The Magma 850 is praised for its cozy, toasty feel and wind-blocking collar, though some note minor fabric noise. The Neutrino Pro, meanwhile, is consistently described as lightweight, soft, and snug without being restrictive, with a fabric that feels gentle against the skin and allows easy movement. Its adjustable hood and cuffs enhance comfort by sealing out wind without pressure points. While both are comfortable, the Neutrino Pro’s combination of softness, freedom of movement, and thoughtful design elements gives it a slight but meaningful advantage for all-day wear on long hikes.

Packability matters for hikers who need to stow their jacket in a backpack when temperatures rise or during climbs. The Magma 850 compresses easily into its own left-hand pocket and is praised for its ultralight, compact storage. The Neutrino Pro matches this with excellent compressibility, packing down surprisingly small and lofting back up quickly. Buyers of both note it’s easy to carry and doesn’t take up much space. While the Magma is slightly lighter, the Neutrino Pro’s packability is nearly identical without sacrificing durability or warmth. For practical purposes, both are top-tier, making this a tie—though the Neutrino Pro’s ability to compress without compromising performance gives it a subtle edge in real-world use.

Mobility is essential for hiking activities that involve reaching, climbing, or adjusting gear. The Magma 850 has gusseted elbows, but multiple users report feeling restricted in the shoulders and during overhead movements, limiting its usefulness for technical terrain. The Neutrino Pro, by contrast, features articulated arms, a two-way zipper compatible with climbing harnesses, and adjustable cuffs and hem that allow full range of motion without binding. Buyers consistently note they can move freely, reach overhead, and wear it under a pack without discomfort. This difference is significant: the Neutrino Pro is designed for active use, while the Magma’s slim cut sacrifices mobility for a sleek profile. For hikers who need to move dynamically, the Neutrino Pro is the clear winner.