Actually the Varius Guide is zip in compatable but I dont know about the Diaz. Regardless zipping in is a pain and I recommend just layering. Sometimes when you get a good wind it can get through the zips and because of the fact that the liner zips in behind the main outer zip and leaves an inch or so where the only protection is the outer wind flap and whatever base layer you have on so again my advice is to not zip in just layer

different zipper for Diaz