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2. Helly Hansen - Wikipedia

   en.wikipedia.org/wiki/Helly_Hansen

   Helly Hansen (HH) is a Norwegian manufacturer and retailer of clothing and sports equipment and a subsidiary of the Canadian retail chain Canadian Tire. Currently headquartered in Oslo , it was previously headquartered in Moss, Norway , from its founding in 1877 until October 2009.

3. Guy-wire - Wikipedia

   en.wikipedia.org/wiki/Guy-wire

   The insulators and arrestors must be maintained carefully, because an insulator failure can result in a mast collapse. Egg insulators have the porcelain in compression and if it fails, the end loops of the guy wires are still intertwined. Cylindrical strain insulator of type used on utility pole and antenna mast guys.

4. Corona ring - Wikipedia

   en.wikipedia.org/wiki/Corona_ring

   The potential gradient (electric field) across an insulator is not uniform but is highest at the end next to the high voltage electrode. If subjected to a high enough voltage, the insulator will break down and become conductive at that end first. Once a section of the insulator at the end has electrically broken down and become conductive, the ...

5. PrimaLoft - Wikipedia

   en.wikipedia.org/wiki/PrimaLoft

   However, down still has a better weight to warmth performance when dry. [13] Unlike down, PrimaLoft is able to retain 96% of its insulating capability when wet by maintaining its loft, and therefore is used in clothing and equipment intended to be used in cold, wet conditions, such as jackets, parkas, gloves, sleeping bags and footwear. [14]

6. Comparative Tracking Index - Wikipedia

   en.wikipedia.org/wiki/Comparative_Tracking_Index

   To measure the tracking, 50 drops of 0.1% ammonium chloride solution are dropped on the material, and the voltage measured for a 3 mm thickness is considered representative of the material performance. Also term PTI (Proof Tracking Index) is used: it means voltage at which during testing on five samples the samples pass the test with no failures.

7. Down feather - Wikipedia

   en.wikipedia.org/wiki/Down_feather

   The down of birds is a layer of fine feathers found under the tougher exterior feathers. Very young birds are clad only in down. Powder down is a specialized type of down found only in a few groups of birds. Down is a fine thermal insulator and padding, used in goods such as jackets, bedding (duvets and featherbeds), pillows and sleeping bags ...