Just tested my first down underquilt last nite out in my back yard. It got down to 23*F with a slight breeze. No tarp doors on the hex tarp, but did pull the hammock sock up about half way. That was the end the breeze was coming from. Slept warm all nite. WHY did I wait so long to do a down UQ??? Many thanks to Stormcrow at Hammock Gear and all of Hammock forums. It was so nice to stuff hammock, UQ & all into backpack & have tons of space left in pack (no more synthetic UQ's). Again thanks Adam & Jen.