2 Interlock Wool Full Coverage Doublers Size Large from Bumby for Cloth Diapering Our Full Coverage Doublers (FCD) are almost a cover in and of themselves, but without the bells and whistles. Simple serged edges on the top and leg holes, reducing our costs which we can pass onto you. These can be used a few different ways: As a barrier between a diaper and knit wool to help reduce felting and dampness Pull on over diaper then add a diaper cover for really great added protection Great night time solution, you can heavily lanolize this and just use it at night to boost your routine To boost the performance of the cloth diaper, adding an extra layer where it’s needed most A cost effective and uncomplicated lightweight diaper cover for light coverage, great for the beach Some have used for potty learning too! They do not stay on super well without something to hold them up like a cover or pants