One of the best pieces of gear I own is my current sleep setup from Zpacks. Although not the cheapest option on the market the regular length 20 Degree Zpacks sleeping bag is an excellent purchase when weight and bulk are of concern. The bag comes in in a regular length, long length as well as regular width, wide, and extra wide. The particular bag I have is a regular length, regular width. I purchased the bag slightly discounted through the 'Bargain Bin' link on the Zpacks website. The bag is filled with 900 fill down and uses cuben fiber baffles to cut down on weight. On my home scale the bag without the cuben stuff sack comes in at 16.7 ounces. Slightly over a pound for comfort at 20 degrees is impressive.
Zpacks is a small cottage company that makes insanely light sleeping bags, tarps, tents and packs. They also carry a line of cuben clothes and accessories. The company has continued to expand it's line throughout the years and has introduced some unique pieces.
I remember when I got the package containing the bag I could not help but notice how small and light it was. I was doubting that the sleeping bag was even in the bag. The bag arrived in a cuben fiber stuff sack that contains the bag in a manageable size. Considering the stuff sack is not a compression sack the size is easy to pack into a bulging backpack. The cuben stuff sack has a velcro closure up top which you then roll over itself (similar to a dry bag) and clip shut. The bag is easily stuffed into the bag and is retrievable with care. The material that the bag is made of is nylon that is soft to the touch. The zipper is a 3/4 length and tiny but very smooth. It is locked shut via a small piece of velcro.
This bag has been the only bag I use for both winter and summer trips around Arizona. The bag works excellent on the ground and the 3/4 zipper allows for adequate venting on balmy nights. On occasion I have also slept atop the bag, but this method is less comfortable because the ripstop tends to stick to bare skin in humid conditions. Obviously this is something that the bag is not intended for but does happen occasionally. The bag has also been used in conjunction with an under quilt while hammock camping. On excessively cold nights I sleep with the zipper closed to retain some heat even though the down is compressed against the hammock material.
-The weight and pack size of this bag makes it an easy sell.
-The 20 degree rating seems to be accurate and I have even pushed the bag down into the single digits. On these occasions I was not particularly comfortable but it was manageable.
-The ultralight zipper has held up to hundreds of uses and is buttery smooth to open, even with chilled hands.
-The price tag is modest considering the weight and size of the bag. There are not many comparable bags that show similar workmanship.
-Joe and the staff at Zpacks provide phenomenal customer service, very quickly.
-Since the day the bag arrived there has been a small, but noticeable loss of down through the seems. The loss has not caused performance issues with the bag.
-The velcro strip that holds the zipper shut rarely holds itself closed. I have not had any issues with the zipper coming undone at night. On the flip side I could see how if you stuffed yourself in there like a sausage the zipper could fail.
-The cuben fiber stuff sack was a disappointment as the repeated stuffing of the bag caused a hole to form and the stitching to loosen.
The Zpacks 20 Degree bag is a solid piece of gear that is well worth the price. The combined size and weight of the bag is excellent for weight weenies and those looking to downsize their pack. The bag has out performed my expectations and continues to provide loyal service with no second thought needed. Buy this bag if you are in the market for a lightweight, and compact sleeping bag. The bag can be purchased in the options mentioned above as well as 40 degrees, 30 degrees, and 10 degrees. The Zpacks company also takes on custom projects if you have any ideas to individualize your equipment.
This is an XS Sea to Summit eVent compression sack with the bag inside. I prefer this method as it allows me to lash the bag to the outside of the pack if space is limited at the beginning of trips. Being waterproof I do not need to worry about the down absorbing moisture. I try to keep the bag inside this as little as possible to cut down on the stress.