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.
Rab Women's Xenair Alpine Light Jacket
Rab Women's Xenair Alpine Light Jacket Rab Women's Xenair Alpine Light Jacket
Rab Women's Xenair Alpine Light Jacket
£153.00
£170.00
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3 In Stock
Patagonia Men's R1 Air Crew
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Patagonia Men's R1 Air Crew
£90.00
2 In Stock
Patagonia Men's R1 Air Zip Neck
Patagonia Men's R1 Air Zip Neck
Patagonia Men's R1 Air Zip Neck
£110.00
2 In Stock
Patagonia Men's Nano-Air Hoody
Patagonia Men's Nano-Air Hoody
Patagonia Men's Nano-Air Hoody
£220.00
2 In Stock
Patagonia Women's Nano-Air Hoody
Patagonia Women's Nano-Air Hoody
Patagonia Women's Nano-Air Hoody
£220.00
1 In Stock
Mountain Equipment Men's Switch Jacket Cosmos
Mountain Equipment Men's Switch Jacket
£117.00
£130.00
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1 In Stock
Mountain Equipment Men's Switch Pro Hooded Jacket
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Mountain Equipment Men's Switch Pro Hooded Jacket
£153.00
£170.00
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1 In Stock
Rab Men's Xenair Light Jacket
Rab Men's Xenair Light Jacket
Rab Men's Xenair Light Jacket
£135.00
£150.00
Save 10%
1 In Stock
Rab Men's Xenair Alpine Light Jacket
Rab Men's Xenair Alpine Light Jacket Rab Men's Xenair Alpine Light Jacket
Rab Men's Xenair Alpine Light Jacket
£153.00
£170.00
Save 10%
4 In Stock
Rab Men's VR Summit Jacket Celestial/Polar Blue
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Rab Men's VR Summit Jacket
£148.50
£165.00
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2 In Stock
Rab Women's VR Summit Jacket Crimson
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Rab Women's VR Summit Jacket
£148.50
£165.00
Save 10%
2 In Stock

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