In the below YouTube video I introduce a custom 20-degree asymmetrical down underquilt specifically made for the Hennessy Hammock Ultralight Backpacker Zip. I recognize that there have been other attempts to make an asymmetrical underquilt, but I have never seen one specifically made for the Hennessy Hammock or one that uses down for the insulation. To accomplish this build, I sent my Hennessy Hammock Undercover Protector to Ben Smith of Goose Feet Gear and worked with him to create a down underquilt specifically for my Ultralight Backpacker hammock using the undercover protector. As far as we know, this is the first ever down underquilt specifically made for the Hennessy Hammock Ultralight Backpacker Asym Zip.

https://youtu.be/FJ6VGC9Uf7Q