If your hat has a mesh crown, you can simply string the chinstrap through the mesh. First, poke 1 hole on each side of the seam at the back of the crown, making sure that the holes are large enough to accommodate passing the chinstrap through them (it’s best to use something with a tapered tip, like a pen or pencil, but a metal awl works best). Second, push the ends of the chinstrap through the 2 holes (from inside to outside). Next, poke 2 more holes (one on the right side, and one on the left side) in the middle of the crown, just above the hatband. Then, push the ends of the chinstrap through the 2 holes (from outside to inside). Finally, push both ends of the chinstrap (one at a time works best) through the adjusting bead to complete the installation. To see a video tutorial, click here.