Wearing your hair extensions in a half up, half down style is a great way to add some variety to your hairstyle. Here are a few steps to help you achieve this look:

Start by brushing out your hair extensions to ensure that they are smooth and tangle-free.
Use a comb to section off the top half of your hair, from your temples to the back of your crown.
Gently tease the crown section of your hair with a comb to add volume.
Gather the top section of your hair and secure it with a hair tie or clip at the back of your head.
Use a brush to smooth out any bumps or flyaways in the top section of your hair.
Let the bottom half of your hair fall down naturally.
Use a curling iron or straightener to add waves or curls to the bottom section of your hair for added texture and volume.
Finish off the look by using hairspray to keep your hair in place.

With these simple steps, you can easily achieve a beautiful half up, half down hairstyle with your hair extensions. Experiment with different styling techniques and accessories to make this look your own!