What are these ?

[arcana73]

I have those. They came with my UGQ Bandit if I wanted to attach it to a sleeping pad

[Rouskof]

I have those. They came with my UGQ Bandit if I wanted to attach it to a sleeping pad

Oh, so that's the mystery unveiled ! A Google search brought me to a very neat and clear video : https://www.youtube.com/watch?v=wQ1HVXDVdbs

I still have a feeling a lot of air is entering the quilt with this system vs tucking, but it is worth giving it a try as I am converted to quilts on the ground as well anyway. So that was not a late-night drunk splicing doohickey but as usual some deeply engineered thingamabob.