I've never made down pants... I prefer my pants to stay up. <img src="/forums/images/graemlins/wink.gif" alt="" />

Remember that if you use a non-quilted pattern, add length to the pattern to accomodate for the lengthwise shrinking caused by the puffing out of the fabric:

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... how much length you add will, of course, depend on on how thick you're going to make your pants.

MNS
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YMMV. Viewer discretion is advised.