I picked a scab & can see a layer of white there. What is it?

It's a little dented but not very deep %26amp; it doesn't really hurt.





%26amp; It's on my forearm.





I thought it might be the layer of fat or something but it doesn't really seem deep enough... :/I picked a scab %26amp; can see a layer of white there. What is it?
Its skin.