Product reviews/11/16/2023

An Evolution in Performance Insulation

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Three years of development have gone into Mountain Equipment's Oreus Jacket and its patent pending Aetherm™ insulation. It has a superior warmth-to-weight ratio, making it perfect for alpinists, mountaineers, and winter walkers who value performance.

Winner of the ISPO Award 2023: The Oreus Jacket (Aetherm Insulation) from Mountain Equipment.

The status quo for performance insulation hasn’t changed for years; outdoor enthusiasts, in the main, can choose either down or synthetic. Down insulation is incredibly efficient and effective and feels great. But it doesn’t perform well once wet. Synthetic insulation works in damp conditions but isn’t as efficient or packable as down.

New Synthetic Insulation Construction

Aetherm™ pushes the limits of what is possible with insulation, creating a new performance benchmark. The secret is the unique patented construction. “The unique 3D structure of Aetherm insulation provides unparalleled performance characteristics not found in other synthetics,” comments Dr Matt Fuller, Product Engineer at Mountain Equipment. Multiple strands of 100% recycled polyester fibres are interlocked within a reflective layer to provide exceptional warmth. Aetherm™ provides a feeling like no other when worn, with a best-in-class warmth-to-weight, loft and packability.

Mountain Equipment has developed a new insulation technology: Aetherm™ precision insulation.
Image credit:
Mountain Equipment

Superior Warmth-to-Weight Ratio

Offering several advantages over down insulation, Aetherm™ retains a “down-like” supple and protective feel. But unlike down, it is brilliant in damp and snowy conditions. Interlocking recycled polyester strands allow moisture to dissipate quickly due to its larger surface area while allowing air to pass through the interlocking fibres, ensuring a quick drying time and retaining warmth even when wet.

Aetherm™ can be precisely used within a garment without the need for traditional stitch-through baffles, which can cause cold spots due to migrating loose-fill insulation or wind penetrating through the stitch seams. It can also be packed and re-packed endlessly as the interlocking structure of the insulation minimises bulk but also ensures it does not lose its loft or performance.

Aetherm™ precision insulation can be found in the new Men’s and Women’s Mountain Equipment Oreus Jacket and Vest, designed for a wide range of alpine pursuits where low weight and dependable warmth are essential; these styles will launch to the market in Autumn/Winter 2024.

The Oreus Jacket by Mountain Equipment is available for men and women.
Image credit:
Mountain Equipment

This Convinced the Jury:

  • Innovative new development of synthetic insulation
  • Particularly good warmth-to-weight ratio
  • Heat-regulating, windproof, small pack size
  • Helmet-compatible hood

Statement From Mountain Equipment:

"We are thrilled to receive the ISPO Award for the Oreus Jacket. This award is a testament to our exceptional product and design teams and their ongoing commitment to providing our customers with the best possible products for their outdoor adventures."
Terry Stephenson, Head of Marketing at Mountain Equipment

The Judges Said:

"Instead of waiting for other companies to develop new insulation technologies, Mountain Equipment has used its own experience to become one of the inventors. The jacket is exceptionally light, soft, warm and packable - perfect for many outdoor activities, from mountaineering to ski touring".
Jury ISPO Award