Down bag: draft tube issue

[Ivo Vanmontfort]

I've made a down bag filled with 1000 gram 860 cuin down.
I wanted a central zipper just like the la fayette from Valandré.

Using a zipper on the left or right, then, it's easy to integrade a draft tube.
But with a zipper in the middle and a baffle hight of 11 cm?
I've found a solution for this issue by using two zippers, one for te outer, one for the inner.
The vertical part pops a little for a better seal.
Using continues baffles so I can give extra pressure lying in the bag.

Some photo's

Some extra photo's and words on my dutch blog

[Chris Stafford]

That is some absolutely amazing work. I wish could make something near as nice as that. That sleeping bag looks nicer than the Mountain Hardware one in my closet.

[Jerry Adams]

Nice job!

What happens if you don't zip the inner zip, does the down tend to fill in that space or is there an air gap? Maybe you don't really need that zipper?

I like the central zip. I do that on my bags. Makes it easy to vent when your sleeping bag is warmer than necesary, like at the beginning of the night. I don't know why nobody else does that.

[Ryan Smith]

Nice work Ivo. Man, that thing is chock full of puffy goodness.

Ryan

[Author]

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