"The Wooki® underquilt is our full-length underquilt for the Blackbird, Blackbird XLC, Eldorado and Traveler hammock models.
 
Note: the Wooki does not have a reversible lay,  it is configured for a head left/feet right lay. 
 
The “XL” size fits: Blackbird XLC Eldorado Traveler XL 
 
The Wooki® underquilt covers the whole bottom of the hammock but only a portion of that is insulated, with the insulated area being approx. 44″ wide x 76″ long and tapering towards the feet. It doesn’t require any adjustment, you literally set it and forget it. If you are over 6’4″ in height the Wooki is still sufficient. The insulated part goes right to the tip of the footbox and your feet should never hang past that point when laying in the hammock correctly. If the tip of your head sticks a few inches past the insulation this is also not an issue, in warmer weather you do not need insulation there, in colder weather you will be wearing a hat or down hood and possibly a pillow, any of these things will take care of insulation for your head. We have users all the way up to 6’6″ using the Wooki with no issues.
 
The Wooki® underquilt features a dual differential cut 20 Denier High Threadcount DWR ripstop nylon shell(Durable Water Resistence), and is overstuffed with 850 fill Hyper-Dry DWR goose down which meets the new RSD certification (Responsible Down Standard)."
 
The above wording is straight from Brandon, and his team at Warbonnet Outdoors. These are the XL version.
 
 View the full product details on the Warbonnet Outdoor website.