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Nordisk Knuth -20° Mummy Sleeping Bag
Nordic Knuth -20° Mummy Sleeping Bag
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The Nordisk Knuth -20° Mummy Sleeping Bag is a warm, mummy-shaped synthetic sleeping bag for winter camping, ski touring and other adventures in really cold weather. The recycled NorGuard S-PO 85® insulation is combined with an adjustable 3D hood, thermal collar and body-hugging fit to reduce unnecessary heat loss.
The sleeping bag has a comfort temperature of −10 °C and a limit temperature of −20 °C. This makes Knuth a robust alternative for cold winter trips where warmth and moisture-resistant synthetic insulation are prioritized over the lowest possible weight and packing volume.
The product name's −20 °C refers to the sleeping bag's stated limit temperature and should not be interpreted as a comfort temperature for all users.
Comfort temperature: −10 °C – the temperature most relevant for those who easily freeze.
Limit temperature: −20 °C – the lower temperature limit that Nordisk specifies for the sleeping bag.
Extreme temperature: −40°C – a safety limit for survival, not a temperature for normal or comfortable use.
The perceived warmth is affected by, among other things, the R-value of the sleeping pad, clothing, wind, humidity, tent, food intake and individual cold tolerance. When used in winter, the sleeping bag always needs to be combined with a well-insulating sleeping pad.
Knuth -20° is filled with NorGuard S-PO 85® made from 100 percent recycled polyester. The insulation is built up in several layers and provides a fill weight of 1,600–1,800 grams depending on size.
Synthetic fill generally retains more of its insulation in damp conditions than untreated down and is easier to dry during longer winter trips, making the construction well suited to variable winter weather and use over several consecutive nights.
The outer fabric is made of durable 20D ripstop nylon made from recycled polyamide. Both the fabric and filling are recycled, and the construction is made without intentionally added PFAS.
The 3D shaped hood can be adjusted around the head to reduce the open area and retain more heat, while an internal thermal collar helps to limit air circulation between the body part of the sleeping bag and the opening at the shoulders.
Knuth also has a separate zipper at the shoulder. This allows you to free your arms while keeping your torso and head protected in the sleeping bag – handy if you need to organize your equipment or cook breakfast from your sleeping spot.
The Sharkfin shaped foot box provides more space for the feet without the need to make the entire sleeping bag wider. The construction helps maintain an effective mummy fit while allowing the feet to lie in a more natural position.
A separate zipper at the footbox can be opened for ventilation. Together with the two-way side zipper, it makes it easier to regulate the temperature when the weather changes or when the sleeping bag is used on milder nights.
Knuth -20° is available in Medium, Large and X Large. Choose a size that provides sufficient length without unnecessary void space, as a sleeping bag that is too long or wide requires more body heat to warm up.
| Size | Recommended body height | Sleeping bag length | Shoulder width | Hip width | Foot width |
|---|---|---|---|---|---|
| Medium | 160–175 cm | 190cm | 71cm | 63cm | 54cm |
| Large | 175–190 cm | 205cm | 73cm | 65cm | 55cm |
| X-Large | 190–205 cm | 220cm | 76 cm | 67 cm | 56 cm |
Warm synthetic sleeping bag for winter use
Comfort temperature −10 °C
Limit temperature −20 °C
Mummy shape that reduces unnecessary air space
NorGuard S-PO 85® synthetic insulation
Filling made of 100% recycled polyester
Outer fabric made of recycled 20D ripstop nylon
Made without intentionally added PFAS
Adjustable and shaped 3D hood
Internal, adjustable thermal collar
Spacious Sharkfin footbox
Separate ventilation opening at the feet
Two-way side zipper
Extra zipper at the shoulder
Soft inner lining
Compression bag included
Available in three lengths
| Size | Product weight | Declared total weight | Filling weight |
| Medium | 1,900g | 2,055g | 1,600g |
| Large | 2,050g | 2,190g | 1,700g |
| X-Large | 2,250g | 2,390g | 1,800g |
Product type: Winter sleeping bag
Shape: Mummy
Temperature, comfort: −10 °C
Temperature limit: −20 °C
Temperature, extreme: −40 °C
Sizes: Medium, Large and X-Large
Outer material: 20D ripstop nylon
Material composition: 100% recycled polyamide
Material weight: 41 g/m²
Insulation: NorGuard S-PO 85®
Filling material: 100% recycled polyester
Insulation construction: 1 × 175 g/m² and 2 × 150 g/m²
Zipper: Two-way side zipper
Zipper location: Left side
Extra openings: Shoulder zipper and openable foot box
Hood: Adjustable 3D hood
Warming collar: Adjustable
Color: Forest Night Green
Pack dimensions: Approximately 29 × 43 cm
Compressed packing dimensions: Approximately 29 × 37 cm
Packing bag: Compression bag with straps
PFAS: No intentionally added PFAS
Area of use: Winter camping, ski touring, winter hiking and bushcraft
Air out your sleeping bag after each use and allow it to dry completely before storing. Always follow the washing instructions on the product label and use a detergent suitable for synthetic sleeping bags. Avoid fabric softener.
The compression bag is intended for transport. For longer storage, the sleeping bag should be stored loosely in a large storage bag or hung in a dry and airy place. Prolonged storage in a tightly compressed state can reduce the loft of the insulation.
