this five-season expedition sleeping bag is designed for the keen mountaineer and built to offer protection in extreme environments and weather conditions. Expert Series The World Roof casts a comfortable and incredibly warm K Dry Down, a goose down protected from dampness using a fluorocarbon free treatment that creates a barrier that repels water while maintaining the down’s puff and thermal capacity, even in wet conditions. An insulated shoulder collar, inside, seals the heat and a shortened zippered opening with a double anti-cold flap reduces the space for cold to get in when you slip in. In lab tests, its comfort limit is -20°C. But it was proven to cope with far more intense cold, based on expedition feedbacks.
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Description of WORLD ROOF
“This sleeping bag, intended primarily for expeditions, will be your faithful companion in the harshest conditions,” advises Antoine, product manager. “In laboratory tests meeting the latest standards, its comfort limit was -16°C. But we know, based on expedition feedback, that it's still comfortable in far more intense cold.” What makes it so effective? The ultra-high-quality goose down that fills the top section of the bag, plus the Downtek-treated duck down which fills the rest – bottom section, feet and head. Naturally, down stops insulating once it’s wet, but Downtek technology works round the problem: the treated down has excellent hydrophobic properties, so it keeps all its thermal capacity. We like the dimensions of this specifically-shaped bag, designed for expeditions: it’s longer, so you can sleep fully-clothed and keep gear dry and warm at your feet. Did you know? There are three types of sleeping bag insulation: down, synthetic and composite (mixed). Down offers an unrivalled lightness-to-thermal efficiency ratio. Weight-for-weight, you get the greatest warmth. It's very compactable but the down fluffs back up again perfectly. Insulation is all about volume. “Its loft means plenty of air is trapped.” And that's great because, ultimately, it's the air that protects us from the cold!
Length: 225 (195) cm; Width: 85 (50) cm
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