"This is my version of a summer sock. It is made from ARGON 90 and Nanoseeum so it is breathable but has a quality DWR for quilt protection. It is designed to work with a hammock with a ridgeline. Tapered on one end and drawstring on the other. The Summer sock has a panel nanoseeum the full length of the sock and can be turned to vary the amount of venting. This will come in a medium mesh stuff sack. Comes in black and of course it is made in the USA."
 
The above wording is straight from Dutch and his team.
 
This is a 11 foot version with a zipper in black.