To keep a silk headband from slipping, try tying a silk scarf in a knot at the middle, placing the headband over your hair, and then covering the sides of the headband with the silk scarf by knotting it at the back of your head.
This method uses the added friction and security of a silk scarf tied underneath the headband to keep it in place. The scarf acts as an anchor, preventing the smooth silk headband from sliding off, especially on fine or freshly washed hair.
