Additional comfort and insulation is given by the 3D mummy shape. By redesigning the traditional mummy shape to include additional high integrity fibres in the sidewalls we have created a shape that gives extra space where you need it without increasing weight and bulkiness. This is the closest you can get to high quality down performance with all the advantages of a synthetic filling. The filling, evolutionary design and quality makes this a unique range of fibrefilled bags. The Performance bags also have the patented inside closing of the hood opening. These bags are designed for maximum insulation and comfort, with a minimum of weight and pack size.
About syntethic fibre sleepingbags
To achieve the maximum performance in our fibre bags we use different fibers and mixtures depending on the performance criteria of the sleeping bag. All our fibre filled bags is build up by layers of fibres. Summer bags consist of one fibre layer, whilst 3 season and winter bags have several fibre layers with “dead air” spaces to avid cold spots and penetration of cold air from the outside. The thick- ness of a layer my vary from model to model depending on the temperature area the bag is intended for. Each layer is built up by many thin layers. The more layers the more surface for air to get trappet and the better the insulation. We don ́t use binderfibre or glue to keep layers together, instead we use a non woven fabric that also adds insulation. We also mix different fibres to get the best insulating, strength and compressibility combined with a soft feel.

Modern synthetic materials are not far behind down in their ability to retain heat. The advantage that a synthetic bag has over down is its ability to insulate even when damp. Always bear in mind that a damp bag is never as comfortable as a dry one of course and for this reason you should air your synthetic bag after use as you would a down one. A synthetic bag will dry much quicker than a down one and it does not need to be tumble dried to loft up as does a down bag.
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100% insulation FIBRE
Because the production of Nanoks sleeping bags and insulated clothing is integrated with the production of the fibre filling, Nanok does not have to use glue or binder fibres to create durable mats with an excellent performance. Nanoks mats therefore consist of 100% heat retaining fibres. Most competitors use up to 23% glue or binder fibre, this means that an 80gr/ m2 of Nanok mat insulates about as well as about 100gr/m2 mat from other companies. Another benefit of this process is that Nanoks mats can be washed at 60°C without loosing performance. Because of our unique production techniques, Nanok can also blend fibres with different and finer thicknesses and properties and can therefore produce mats with more layers than our competitors. A 100gr/ m2 mat from Nanok has 10 -11 layers, where normally only 3-4 layers are used to get the same thickness.
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3-D Sleeping Bags
Compared to other synthetic sleeping bags, Nanoks Performance bags are not only produced mummy shaped in plan but we have also introduced a 3D construction with side walls to give the bags a true three dimensional shape, just like humans. .
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Zipper Up
The Zipperʼs on Nanok bagʼs are positioned higher up the sideʼs than a conventional sleeping bag, This reduces heat loss and the zipper is more accessible for opening and closing.
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The Outside/Inside
The outer layer of a Nanok bag is bigger than the inner layer meaning that the insulation is not compressed when you move inside the bag.
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AirLock self closing neck baffle.
This is a big anatomically down filled baffle that keep the warm air inside the bag and prevent cold air of getting in - and it´s done without any draw cords.
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