I’ve mentioned before that I was getting my mother to make a small draught collar for my Cumulus Ultralight 350 sleeping bag. I like this sleeping bag. Despite the down quality not being quite so good as my other sleeping bags, I like the cut (slightly slimmer than the WM Highlite and Alpkit Pipdream) and the trapezoidal baffles are more effective at eliminating cold spots. However, it doesn’t have a draught collar, so heat can escape when the hood is closed.
The Valandre Bloody Mary sleeping bag has removable draught collars, which I thought was a good idea to copy. Fortunately my mother is a superb quilter, so after explaining what I wanted she made me a removable draught collar. Well, it’s more like a draught strip. It’s very light (19g) and uses velcro to attach to the sleeping bag. The material is some Pertex type material and it is filled with a bit of quilt wadding. Below are some pictures that hopefully demonstrate how it works.
Above: Draught tube attached
Draught tube half removed.
Draught tube detached.
Quite a neat system. I’ve not tried it yet, but it should prevent the “chimney” effect when I move about in the bag. If it doesn’t work, I can always leave it off.