I sewed a LOT of outdoor stuff when I was a teenager - I don't know if anyone remembers Frostline kits. I sewed a tent, down sleeping bag, foam pad (cover), daypack, backpack (for frame), several down vests, several down coats, .... . My mom was a home economics teacher and taught all of her kids how to sew.

Though some multiple seam areas could get kind of tough - especially when it involved the bottom/top of a zipper, I never really had any problems with sewing cordura with a sewing machine. I just went slow so as not to damage any equipment.