The Pass KalPlus from Rinati Lakel is very similar to the Boubou Mouss where it has more volume on the top and sides, but the Pass KalPlus has a long strip attached to the back that wraps around itself giving a little more volume on the top and sides than the Boubou Mouss has. It has a velvet band attached all the way around making sure that it stays on/keeps your hair covering on your head. It has an elastic and button closure in the back, please check the photos for more details. This elastic/button combo works great for a variety of head sizes. You can remove/add stuffing from the inside to make the back look smaller/larger, if you'd like. The volume in the back has a set placement, which means that the volume won't move higher and lower.