Please allow 4-5 weeks for bags with overfill.
Down overfill is offered as an option on our sleeping bags. We have worked to optimize the fill amount in our sleeping bags, however some people desire a more densely stuffed sleeping bag.
Overfill packs the down more tightly in the sleeping bag, and can increase the warmth of the sleeping bag. However, since the baffle height stays the same in an overfilled bag, the amount of warmth gained is limited to 5-10°F.
If you would like overfill in your sleeping bag, please use the option above at the time you order the bag. Please note that overfilled bags are considered custom, and are non-returnable.
jim crews –
Jim – April, 2020
Lesson Learned… Percentage fill weight does not correlate 1:1 with percentage volume of the bag. …At least not by my observations.
Flex-15 6′ 6″ wide, standard 19.5 oz. goose down fill weight. I found (visually) there was approx. 20% empty space to move down around in order to regulate temperature (unzipped and shaken lightly to settle down to one side). As I will be using quilt primarily in tent camping, sub-freezing night time temperatures, I ordered with 3-oz. overfill (approx. 15% more down by weight). Thought that would leave about 5% empty bag volume to move down around. However, when quilt arrived it was perhaps 1 or 2% empty volume when open & shaken lightly to settle down. In sum, if you want 5% to 10% empty volume to move down around to help regulate temperature, consider only 5% to 10% overfill by weight, as the 15% extra down overfill by weight I ordered, all but filled the approx. 20% empty volume observed in the standard bag. Would like to have a bit more room to move down around but no problem. Love the bag, great in sub-freezing weather. Lowest temperature I observed on first use in the Rockies was 23*F. Extra down should extend the low temperature useful life of the bag as well. But If I had a do-over I would order it with 2oz. overfill (approx.10% of total fill weight).
Taylor –
I added 1 oz overfill on my Flex 22, in theory this makes the quilt around 20 degrees. I think overfilling any bag or quilt is a great idea for longevity of the product. Katabatic is known to have very generous comfort ratings, I am glad to see the honest work of Katabatic over other companies trying to sell products with less down and counting every gram.
Ronald Dillon –
I’m a big believer in overfill. It increases the warmth but just as important helps control down shift within the baffles.
John –
Overfill is a very useful option for customizing your system to your exact needs. I purchased a Flex 30 quilt and chose to add one ounce of overfill to it. In theory this made it a 27 degree quilt. Since I try to make the most of the hiking season, the few extra degrees of comfort afforded by the overfill buys me an extra 3 weeks. It has allowed me to hike all the way into the first week of December. I expect to be back on the trail by mid March. This added additional flexibility to an already fantastically functional sleep system. I couldn’t be happier with my decision.