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Second, I vetted ratings to ensure each product received more than 80 percent five stars. ... For even more insights on that—including whether The North Face 550 or 700 might be better for you ...
EN 13537 (or EN13537) is a European standard designed to standardize the temperature ratings on sleeping bags manufactured and/or sold in Europe. As of 1 January 2005 a CEN criterion came into effect covering the testing and publication of temperature ratings for sleeping bags. The new criterion differs from the standards that existed formerly.
The North Face is an American outdoor recreation products company. The North Face produces outdoor clothing, footwear, and related equipment.Founded in 1968 to supply climbers, [2] the company's logo [3] draws inspiration from Half Dome, a distinct rock formation rising over 8,700 feet (2,700 m) above sea level in Yosemite National Park. [4]
Fill power is a measure of the loft or "fluffiness" of a down product that is loosely related to the insulating value of the down. The higher the fill power, the more air a certain weight of the down can trap, and thus the more insulating ability the down will have.
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ASHRAE 55-2017 defines the Cooling Effect (CE) at elevated air speed (above 0.2 metres per second (0.66 ft/s)) as the value that, when subtracted from both the air temperature and the mean radiant temperature, yields the same SET value under still air (0.1 m/s) as in the first SET calculation under elevated air speed.