[Solved] How to delete mesh

I've never worked with mesh or Blender before so I'm totally clueless haha. 

So I selected 'Create CAS Standalone' and picked a bracelet that I could use to make an armband. I created the armband and imported it into Sims 4 Studio and it works fine except the bracelet mesh is still there (I'm fine with the armband being flat). I tried exporting the mesh and deleting it in Blender and importing it back in but it's still there. Is there another method to create the armband or is there any way I can just delete the bracelet mesh?

Here's some pictures:
(I want to delete the black bit)


Thanks!