So my son-in-law was replacing the upper ball joint, and 'pulled' out the axle and boot, without taking off axle nut. Trying to reassemble, and he sees what appears to be 2 boots at the CV:

(click to enlarge)
Click image for larger version.  Name: axle2.jpg  Views: 64  Size: 49.7 KB  ID: 68011

What's that 'inner' black boot sticking up in the photo? Is he toast or can this be salvaged?

thanks!