Strength Without Weight The OMM Aether redefines what a true ultralight shell can be. Built from Dyneema — one of the strongest fibres on Earth — it brings mountain-proof protection to a featherlight jacket. It’s the kind of piece that makes you rethink what “lightweight” means: tiny in the pack, tough in the storm, and ready for it all.
Product Ratings
Waterproof
Waterproof Really Waterproof
Breathability
Breathable Ultra Breathable
Features
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What Is the OMM Men’s Aether Jacket?
The Aether Jacket is a high-performance waterproof hard shell designed for mountain running, fastpacking, and ultra-distance challenges where low weight, durability, and protection are essential. Weighing just 215g, it redefines ultralight capability by combining full storm protection with the exceptional tensile strength of Dyneema, one of the world’s strongest fibres. Built for runners facing rapidly changing mountain weather, the Aether shields against wind and rain without restricting movement or trapping heat. Its minimalist construction and performance fit minimise bulk, allowing efficient, unhindered motion.
What Is It Made Of?
3-Layer Dyneema Composite Fabric
The Aether Jacket uses a 3-layer Dyneema and nylon composite engineered for unmatched strength, waterproofing, and breathability in an ultralight package. Dyneema fibres are 15times stronger than steel by weight, giving the jacket remarkable tear resistance despite its minimal mass.
The fabric delivers a 20,000mm hydrostatic head waterproof rating and 20,000g/m² breathability, keeping out heavy rain while allowing moisture vapour to escape during high-output efforts. A smooth nylon exterior resists abrasion and sheds water efficiently, while the Dyneema layer ensures long-term performance in severe conditions.
The jacket is entirely PFC- and PFAS-free, demonstrating OMM’s commitment to reducing environmental impact. The durability of Dyneema extends product lifespan, reducing the need for frequent replacement and lowering overall environmental footprint.
What Are Its Features?
Lightweight Weather Protection
At just 215g, the Aether provides full storm protection without sacrificing speed or mobility. Its 3-layer construction blocks wind and rain while remaining breathable for high-intensity mountain travel.
Performance Fit
Designed for mountain running and fastpacking, the performance fit reduces excess fabric while still allowing light layering. Articulated patterning supports natural movement for running and climbing.
Flatlock Seams
Flatlock seams minimise bulk and friction, preventing irritation from skin contact or pack straps and enhancing durability for long-distance use.
Thumb Loops
Integrated thumb loops keep sleeves in place and provide added warmth and coverage in cold or wet conditions.
Secure Zip Pocket
A zipped chest pocket offers secure, accessible storage for essentials such as gels, cards, or keys, with a water-resistant YKK zip to protect contents from the elements.
YKK Zips
Durable YKK zippers ensure smooth, reliable function in all conditions, maintaining performance even after extensive use.
Features:
- 3-layer Dyneema composite waterproof fabric
- 20,000mm waterproof / 20,000g/m² breathable rating
- Fully windproof construction
- Weighs just 215g
- Flatlock seams for reduced bulk and irritation
- Thumb loops for secure fit and extra protection
- YKK zips for durability and reliability
- Secure zipped chest pocket
- Performance fit for dynamic movement
- PFC- and PFAS-free construction
OMM Aether Jacket Review The Aether is one of those jackets that feels too light to take seriously — until you’re halfway up a ridgeline in a downpour and realise you’re bone dry. The Dyneema fabric has a reassuring crispness; you can feel the toughness even though it barely weighs anything. It packs down to the size of a fist and just disappears in your pack. On the move, the fit is spot on — no flapping, no cling, just total freedom. It simply does what it’s meant to: protect, breathe, and perform.
Does It Feel Noisy or “Plasticky”? Not at all. Despite the Dyneema strength, the Aether feels soft and pliable once it’s on. It has that crisp, high-performance texture, but without the distracting “crinkle” that some ultralight shells suffer from. It moves with you and feels surprisingly natural, even layered over a mid-weight top.
Suitable for All-Day Mountain Wear? Yes — and that’s what’s so impressive. It’s built for high-output movement, but the breathability and comfort make it easy to wear for extended hours in wet, windy conditions. It’s not just an emergency shell for the bottom of your pack — it’s a serious mountain layer for long days, big climbs, and unpredictable weather.
FAQ
Is the Aether Jacket waterproof or water-resistant?
Fully waterproof. The 3-layer Dyneema composite fabric achieves a 20,000mm hydrostatic head rating, delivering proper storm protection.
Can I run comfortably in it?
Yes. It’s designed for mountain running and high-output movement. The articulated cut and low weight keep it comfortable and non-restrictive on the move.
Does it pack down small?
Very. The Aether compresses into a hand-sized bundle, ideal for stashing in a vest pack or side pocket when the weather clears.
How durable is the fabric?
Extremely. Dyneema is incredibly strong for its weight, giving the jacket excellent tear and abrasion resistance despite its ultralight build.
Is it breathable enough for racing?
Yes. The 20,000g/m² breathability rating helps moisture vapour escape efficiently during long efforts and steep climbs.
Is it suitable for year-round use?
Yes. It’s ideal from spring through autumn, and it works well as a storm shell in winter when layered over insulation.
Are the seams fully sealed?
Yes. OMM uses flatlock seams for comfort and durability, and all seams are fully taped for complete waterproof protection.
Can it be used with a running vest or pack?
Definitely. The smooth Dyneema face fabric resists abrasion, and the low-bulk seam construction helps it sit comfortably under or over a pack.