USPS dropped off a box from Warbonnet Outdoors LLC, inside a new 3 season Mamba. The boots were off in a matter of seconds and under I went.
It has the same brilliant 'tensioning' system found in its big brother the Winter Mamba...the fit at my ht./wt. 6'1" 198ish is just a wee bit more roomy than the winter model--this I'm sure because of much less down. In 20 minutes of expansion and the 2inch loft was met and exceeded...I did order 2 ounces of extra stuffing.
Another work of art from Warbonnetdude. For me (ymmv) I'd expect I can push the freezing make a bit and now I've an excuse to spend the night in the woods.