I agree. 24 oz is pretty heavy. If you're looking for a liner, though, that may be the way to go.
Of course you could bring a blanket for about half the weight or go with a mylar blanket... In my experience, the mylar blankets don't add any warmth of their own. They only preserve existing heat. If you have a sleeping bag or underquilt and/or top quilt already, a mylar blanket or bivy may be just the thing. I have an SOL escape lite bivy and it weighs 148g!
If more layers works for you, that's brilliant. If you're like me, though, you sleep COLD.
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