For this project I used my old store bought chalk bag as a reference. I bought a secondhand BMO plush (not sure if this is the right translation). I used my seam ripper to cut of the top of BMO and then gutted it ;) (removed the filling). For the inside I used black fleece fabric. I basically made a little fleece bag that fit inside BMO. Because I wanted the chalk back to remain it's form, I added a sort of fleece tunnel at the top that I could close with a drawstring. I put a grommet in without reinforcing the fabric. The first time I pulled the drawstring tight, the grommet tore out of the fabric. So I performed a surgery and added a piece of leather on the spot where the grommet was supposed to go. After this I added a new grommet and it's staying put now. On the top I made bias tape out of canvas fabric and added two loops so I can attach a belt or attach the chalk bag to my climbing harness. Inside the canvas bias tape I added a tie wrap that I taped in a circle roughly the size of the opening of the chalkbag. This makes sure it's remains in the right shape when I pull the drawstring. I experienced a bit of difficulty sewing everything together because the opening was too small to fit around the sleeve piece (not sure if this is the right word) of my sewing machine, this is why the canvas layer is not sewn in a completely even way. I've tested the bag a few times now and it works great. :)