Active Insulation

Active Insulation is a term used to describe clothing layers that keep you warm but allow moisture/sweat to escape. These are the ideal mid-layers to be worn when slogging (and sweating) your way uphill in cool weather and can usually be used as your outer layer too for long glacier approaches.

Polartec® Alpha® is the most commonly used fabric in this category and was originally developed for U.S. Special Forces who required a more advanced insulating material in their combat uniforms. This fabric is a new technology with active insulation that regulates core body temperatures during both dynamic and static activities. It helps eliminate the need to shed or add layers while on the move, something that can be difficult to do on steep terrain and which in any case spoils the momentum of your approach. Pit-zips etc have traditionally helped to balance airflow and warmth, but are not ideal as they do not work all over and they leave surface areas exposed to the elements in the process.

Patagonia have made their own active insulation under the name Nano-Air®. It works just like Polartec® Alpha® and Patagonia's slogan, "Put it on, leave it on" sums it up nicely.
 
At Needle Sports, we are very enthusiastic about this new technology and virtually all of us own and use items featuring Polartec® Alpha® or Patagonia Nano-Air®, or an equivalent, and thoroughly recommend it.
Outdoor Research Men's Deviator Hoody Baltic/Charcoal
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Outdoor Research Men's Deviator Hoody
£79.99
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Outdoor Research Women's Deviator Hoody Sangria
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Outdoor Research Women's Deviator Hoody
£79.99
£160.00
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Patagonia Men's R1 Air Full-Zip Hoody Hot Ember
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Patagonia Men's R1 Air Full-Zip Hoody
£117.00
£130.00
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Patagonia Women's R1 Air Full-Zip Hoody Steller Blue
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Patagonia Women's R1 Air Full-Zip Hoody
£117.00
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1 In Stock
Patagonia Men's Nano-Air Jacket Black
Patagonia Men's Nano-Air Jacket
£162.00
£180.00
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Patagonia Men's Nano-Air Hoody Crater Blue
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Patagonia Men's Nano-Air Hoody
£198.00
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Mountain Equipment Men's Switch Jacket Cosmos
Mountain Equipment Men's Switch Jacket
£117.00
£130.00
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Mountain Equipment Men's Switch Pro Jacket Fir Green/Acid
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Mountain Equipment Men's Switch Pro Jacket
£153.00
£170.00
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Mountain Equipment Women's Switch Pro Jacket Tyrian Purple
Mountain Equipment Women's Switch Pro Jacket
£153.00
£170.00
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Mountain Equipment Men's Transition Jacket Cosmos
Mountain Equipment Men's Transition Jacket Cosmos
£135.00
£150.00
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Rab Men's Paradox Light Pull-On Firecracker
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Rab Men's Paradox Light Pull-On
£99.00
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2 In Stock
Rab Men's Alpha Flash Jacket Merlin
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Rab Men's Alpha Flash Jacket
£90.00
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Rab Men's VR Ridgeline Jacket Ascent Red
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Rab Men's VR Ridgeline Jacket
£108.00
£120.00
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Rab Men's VR Summit Jacket Celestial/Polar Blue
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Rab Men's VR Summit Jacket
£144.00
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Rab Women's VR Summit Jacket Crimson
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Rab Women's VR Summit Jacket
£144.00
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Rab Women's Vapour-rise Guide Pant Black
Rab Women's Vapour-rise Guide Pant Black
£91.00
£140.00
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3 In Stock

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