Quilted pants

Mr Hunter has been using the same pants for renos for 3 years now, maybe closer to 4. I had patched them previously, but these pants are literally disintegrating so serious action had to be taken to make these pants last the reno.
So I quilted them!

I didn't add any batting - maybe if the reno isn't done by winter I can add a layer. I did however add a layer of twill and then just meandered all over to give the fabric some strength back. 
Do you think they will last?
Cheers,
Carolyn