WTS Nunatak Custom UL 20deg Synthetic Sleeping bag

[wind gypsy]

This is a 7.5 ounce apex insulated bag i had designed to be a extended wet weather type hunts bag without being a big weight penalty for synthetic. I have slept in it for 15 nights at most, basically one dall sheep hunt and a few nights of backpacking to try it out before said hunt. Cut was spec'd to mimic my beloved standard 6' WM alpinlite but id say it's a little tighter from thighs to calf. Selling because I'm a shell of my former self and dont see extended backpack hunts in my immediate future.

This is an old post i found to give a background of my intent and contrasted with what was available in the kifaru slick bag at the time:

I had an apex bag made by Nunatak last year for extended trips where my bag had potential to get wet or I may want to get into the bag with damp/wet clothes. My typical bag is a WM Alpinlite. My goal was to get similar warmth/fit to the alpinlite but in Apex and be as light as possible. I ended up with what Jan called the Apex Alpinist - you wont find it on their site. It is basically cut like the alpinist center zip down bags but with Apex insulation.

7.5 oz Apex center zip with dual draft tubes on zipper. Dimensions to mimic WM Alpinlite (roomy but not boxy/wasteful). 10D nylon ripstop shell, 10d taffeta lining. Total weight is a hair over 35 oz IIRC. I have found it to be just as warm as my Alpinlite if not warmer. I had a sleeping pad get a hole one night in the mid 20's and woke up uncomfortable but surprisingly warm. Apex doesn't compress as much as down so it provides more insulation from the to bottom than down.

Nunatak and Kifaru are quite a bit different in design theory. Nunatak is a company that is obsessive about the fine details and frills that add weight. Kifaru adds quite a bit of weight/bulk comparatively to achieve durability. I believe the Slick Bag uses a 30d shell which adds a significant weight and bulk that I find unnecessary. I do not use my sleeping bag in conditions where tears and abrasion are a big concern. If tears/cuts do happen the bag has continuous fiber insulation that it isn't going to lose so who cares, some tenacious tape can patch it up. Apex is more resilient than primaloft but still not great, the insulation will be degraded significantly by the time the shell is toast. The cut is also more of a typical mummy cut than Kifaru's so weight is saved there.

I chose the 10d liner because it was the lightest and most breathable. It is not the most effective at repelling moisture. The 7d robic would have given great moisture protection with similar weight but doesn't breathe as well and I wanted to "bake" moisture off of wet clothes. You could get a pertex quantum shell as a good compromise for a little more weight.

Jan recommended 7.5 apex for a 20 degree bag, it seems right on based on experience and ratings from other sources. Kifaru uses 2 layers of 3.6 apex for comparison in their 20 degree slick bag. So comparatively you get slightly more insulation from 7.5, more efficient (warmer) bag cut, but the shell I chose wont be as warm as the kifaru 30d.

Asking $300 shipped in the lower 48. Accept paypal F&F or Venmo. Paypal goods and services + 3% to cover the fees.