Celsius -18° is soft, warm and relatively light sleeping bag for use in very cold weather. The construction is classic mummy with a wide shoulder part and a slanted wall construction for optimal insulation and minimal thermal loss. The durable shell made of polyester has a water repellent base, foot and hood – and the lining is made of 30D nylon with a soft and silky-like feeling. The bag is filled with premium 90/10 European down which are both very warm, light and highly compressable. Celsius comes in three sizes all equipped with a practical inner pocket, a close-fitting hood, a neck baffle and a zipper draft tube.
Nortech Style | S-PO 30D ( Outer schell )
The S-PO 30D is based on a strong polyester thread with a thread count of 355 and a weight of 55 g/m². It has a durable rip-stop construction and ist protected against water penetration through the DWR finishing.
Nortech Style | S-NY 30D ( Lining )
The S-NY 30D is a very strong 30 diener nylon with a thread count of 302 and a weight of 43 g/m². It has a very smooth surface construction an a protective DWR finishing fot optimal water resistance.
Norguard S-DO | 700-90 ( Filling )
Norguard S-DO 90/10 is made of European high quality down, which has undergone special treatment for quick-drying, adding a long-lasting freedom from odours and mould. Norguard S-DO 90/10 has a 90/10 down mix.
A slanted wall construction creates a more difficult path for heat to escape along the relatively low-density insulation area against the side wall. This improves the thermal efficiency of the bag even more than H-box construction.
The most simple design for a sleeping bag is to use the stitched through construction. Using this method the shell and lining are stitched together directly on top of each other to create the chambers into which the filling is inserted.