Sir Joseph Koteka III 850 sleeping bag, black
RRP 569 €
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Delivery method on Thursday 22.01.2026
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Delivery method on Thursday 22.01.2026
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Product description
Thanks to the special new ultra-light outer material SOFTEX® XILO LT, functional accessories and the highest quality feathers, 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 unworn gram is worth its weight in gold. The SOFTEX® XILO LT outer material also delivers excellent resistance to abrasion and feather penetration.
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Sir Joseph Koteka III 850 sleeping bag
Winter ultra-light down sleeping bag for participants in expeditions, extreme crossings and mountain climbs, arctic or desert areas. It will also be appreciated by other lovers of extremely low weight and minimal volume.Thanks to the special new ultra-light outer material SOFTEX® XILO LT, functional accessories and the highest quality feathers, 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 unworn gram is worth its weight in gold. The SOFTEX® XILO LT outer material also delivers excellent resistance to abrasion and feather penetration.
Product features
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In the "women's" size 170, while maintaining the same filling weight as in the 190 cm version and simultaneously reducing the internal volume of the sleeping bag, overall higher thermal comfort is achieved.
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Narrower anatomical cut and minimal details
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Specially developed tight-fitting hood shape
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Closed chambers prevent 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 design
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Self-clips allow for one-handed adjustment of the collar and hood circumference
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A special strip that underpins the zippers prevents heat from escaping through the zipper and prevents the zipper from getting stuck in the fabric.
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Double-sided zipper allows the sleeping bag to be opened from both the top and bottom
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Left zipper only – cannot be interlocked
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New bottom shape "Alpha foot box" - a beveled trapezoid copies the shape of freely lowered feet when sleeping on your back and increases comfort
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Storage bag and waterproof compression bag included
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Product details
| Sex | Unisex |
| Colour | black |
| Filling | down |
| Temperature determination | winter |
| Sleeping bag shape | mummy |
| Sport | hiking, camping |
| Weight | 1160 g |
| Temperature range | Comfort: -10°C Limit: -16 °C Extreme: -34 °C |
| Material composition | Upper material: SOFTEX® XILO LT Inner material: SOFTEX® XILO LT Filling: goose down 95/5 EU, 800 fill power |
| Filling weight | 850 g (170 and 190 cm), 880 g (200 cm) |
| product ID | 374315 |
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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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