Rei Magma 850
Best lightweight insulation for backpackers seeking premium warmth on a budget.
This is the gold standard for ultralight backpackers who refuse to compromise on warmth. It packs down to the size of a water bottle and lofts impressively, though the slim, performance-oriented cut means you’ll need to be comfortable with a tighter fit to reap the weight savings.
$399.00
at
Greenbelly
Who it's for
- Backpackers seeking maximum warmth for minimal weight
- Explorers who refuse to compromise on technical specifications
- Campers prioritizing ethical manufacturing and sustainable outdoor gear
Who should skip it
- Individuals who prefer a more relaxed, spacious fit
- Users easily frustrated by small mechanical gear failures
- Adventurers who frequently encounter abrasive or rocky environments
Performance breakdown
Warmth-to-weight ratio
High-loft down provides exceptional insulation without adding bulk to your pack.
Packability
Compresses down to the size of a loaf of bread effortlessly.
Draft management
Contoured hood and draft collar seal out cold air effectively.
Interior comfort
Spacious cut allows for natural movement without sacrificing thermal efficiency.
Moisture resistance
Treated down maintains loft better than untreated fill in damp conditions.
Zipper performance
Anti-snag design works smoothly even when you are half-asleep.
Know before you buy
Still have a question?
Ask Metto anything about the Rei Magma 850 before you decide.
