LOVE These things! Attach perfectly to the F1 Mainframe and fold open to allow for meat hauling in the middle - tried them out this season and was super impressed, plenty of room to pack out a mature whitetail with lots of room left remaining! Awesome!
Very creative design, help keep things minimal!!!
I use the mainframe and batwings to pack in my sticks. It's super light and comfortable and the batwings holds everything I need.
Like it a lot, using it currently as an add on to the side of a different pack and works well to expand the space