The Alpinist is Nunatak's 18°F center zip mummy bag.
This product is no longer in stock
With the Alpinist we sought to rework the traditional mummy into a sleeping bag we feel is more useful.
We moved the zipper from the side to a center front location. This gives you full use of both arms while still having head and back snug in the sleeping bag, a must when performing sitting camp tasks in less than ideal conditions.
This unique center zip provides more effective torso ventilation, but can also seal up very effectively via the double draft tube backing.
When side sleeping the zipper typically ends up slightly in front, down from the shoulder a bit. Whether it is open for venting or snugged up, this is an ideal location. From here the zipper is conveniently controlled without contortions, and the dreaded back side cold spot from traditional zipper placement on the side hem, is completely eliminated. In fact, side sleeping is almost where the center zip placement is at its best.
Remaking the traditional head opening into the Alpinist/Raku style hood is the natural follow-up to the zipper relocation and is very effective at keeping you warm with less material. When using the Alpinist in warmer conditions, pulling out the head and shoulders from the hood and lying on top is simple. It is easy to do a non-shifting pillow arrangement inside the hood.
The 18° Alpinist is built with a 2" differential cut, a feature that greatly increases the efficiency of a given fill volume.
A Multitude of Stock Options
The Nunatak Alpinist is likely one of the more customizable mummy bags on the market. Using the many options in the configuration menu below, one can create the perfect fit either for body size, special applications or desires.
We offer 6 overall lengths, from extra small to double extra long.
4 different shoulder circumference options with corresponding increases in interior volume. The size choices carry on into the hood and hip area: for example an extra wide bag will also have a bigger hood and a roomier lower middle section. The standard 60" circumference is well sized for most individuals. If your desire is an extra roomy feel, choose 68", and for the very few needing the outmost in sprawl there's a 76" option. Be aware that a large interior volume requires a more energy to keep warm.
The footbox circumference can also be individually sized, independent of length and width. Here the standard is the 40" circumference. For folks with small feet a 36" footbox will be warmer, and, off course, the big guys might consider the 44". Take note that the 68" and 76" shoulder sizes works best with the 44" footbox.
If your needs are not met by the easily configured options presented in the menu below, we also have unlimited custom adjustments available. Please call or email.
For the Alpinist we have literally a staggering amount of shell fabric choices. Please consult the Fabric Info page for detailed description. Basically there's 3 distinct groups:
*The UL (UltraLight) shells in 10 denier count.
*The standard shells in 20d, plus a nice camo option.
*An advanced waterproof/breathable shell with a base fabric of only 7d. Take note that a significant increase in final cost is associated with this.
The Alpinist is rated at 18°F. Adding overfill via the menu below can boost it a few degrees. However sometimes considerable more warmth is needed. For this we recommend layering with the Nova Insulated Bivy, an option with many advantages beyond simply getting a capable setup down to -10°F.