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Ken Graham
Ken Graham
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I think it is easiest to see the difference here: http://www.westernmountaineering.com/sleeping-bags/specification-chart/Specification Chart

The heavier one is a semi rectangular bag while the lighter one is a mummy bag. Both bags have the same amount of loft, which is usually the key to warmth, but in this case the difference in cut matters.

I think it is easiest to see the difference here: http://www.westernmountaineering.com/sleeping-bags/specification-chart/

The heavier one is a semi rectangular bag while the lighter one is a mummy bag. Both bags have the same amount of loft, which is usually the key to warmth, but in this case the difference in cut matters.

I think it is easiest to see the difference here: Specification Chart

The heavier one is a semi rectangular bag while the lighter one is a mummy bag. Both bags have the same amount of loft, which is usually the key to warmth, but in this case the difference in cut matters.

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StrongBad
StrongBad
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I think it is easiest to see the difference here: http://www.westernmountaineering.com/sleeping-bags/specification-chart/

The heavier one is a semi rectangular bag while the lighter one is a mummy bag. Both bags have the same amount of loft, which is usually the key to warmth, but in this case the difference in cut matters.