craftgrrl | Felt && Apron Patterns!!

I hope this is okay to post here :)

I'm wanting to make a cover for my phone with felt and I'm doing to double layer the felt so its thick but I wasn't sure wether felt would scratch the screen on my phone or not? If it would, whats the best thing to line it with?

Thank you :)

ETA:

Oh also, does anyone know of any apron patterns? I'm after one to make something like this one under the cut:

I have some material I'd love to use but cannot find a pattern like it anywhere!! Sorry, I'm just not too sure where to look for things like this :)

Thanks again!