Sir Joseph Koteka III 850 sleeping bag, blue
RRP 579 €
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Delivery method on Monday 03.08.2026
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Delivery method on Monday 03.08.2026
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Product description
Thanks to the special new ultra-light outer material SOFTEX® XILO LT, functional accessories and the highest quality down, the Koteka sleeping bag has half the volume and weight of a classic sleeping bag with the same thermal comfort. You will appreciate the minimal volume and low weight where every uncarried gram is worth its weight in gold. The outer material SOFTEX® XILO LT also offers excellent resistance to abrasion and down leakage.
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Sir Joseph Koteka III 850 sleeping bag
Winter ultra-light down sleeping bag for expedition participants, extreme traverses and mountain climbs, arctic or desert regions. It will also be appreciated by other lovers of extremely low weights and minimal volume.Thanks to the special new ultra-light outer material SOFTEX® XILO LT, functional accessories and the highest quality down, the Koteka sleeping bag has half the volume and weight of a classic sleeping bag with the same thermal comfort. You will appreciate the minimal volume and low weight where every uncarried gram is worth its weight in gold. The outer material SOFTEX® XILO LT also offers excellent resistance to abrasion and down leakage.
Product features
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With the "women's" size 170, while maintaining the same filling weight as the 190 cm version and simultaneously reducing the internal volume of the sleeping bag, an overall higher thermal comfort is achieved
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Narrower anatomical cut and minimum details
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Specially developed snug hood shape
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Closed chambers prevent the feathers from moving around the sleeping bag and allow for washing and easy maintenance
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Chamber construction H
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New 2D collar construction
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Self-locking fasteners allow one-handed regulation of the collar and hood circumference
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A special strip under the zippers prevents heat from escaping through the zipper and prevents the zipper from getting stuck in the fabric
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The two-way zipper allows the sleeping bag to be unzipped from both the top and the bottom
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Left zip only – cannot be zipped together
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New "Alpha foot box" bottom shape - a tapered trapezoid copies the shape of freely hanging feet when sleeping on your back and increases comfort
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Storage bag and waterproof compression sack included
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Product details
| Sex | Unisex |
| Colour | blue |
| Filling | down |
| Temperature specification | winter |
| Sleeping bag shape | mummy |
| Sport | hiking, camping |
| Sleeping bag weight | 1001 - 1500 g |
| Weight | 1160 g |
| Temperature range | Comfort: -10 °CLimit: -16 °CExtreme: -34 °C |
| Material composition | Outer material: SOFTEX® XILO LT Inner material: SOFTEX® XILO LT Filling: goose down 95/5 EU, 800 cuin |
| Filling weight | 850 g (170 and 190 cm), 880 g (200 cm) |
| product ID | 374318 |
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Sir Joseph is a renowned Czech outdoor brand that specializes in producing high-quality outdoor equipment and clothing. Established in the late 1980s, the brand has gained a strong reputation for its innovative designs, durability, and functionality. Sir Joseph's products are designed to withstand the harshest outdoor conditions, making them suitable for adventurers, mountaineers, and outdoor enthusiasts. The brand's extensive range includes sleeping bags, tents, backpacks, clothing, and accessories, all crafted with meticulous attention to detail and using advanced materials and technologies.
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