I have my down coat that I made from a North Face kit, back in the 70s...I sewed it all myself and loaded the down into it from plastic bags. It's still in one piece!!! There weren't any down coats back then...you had to make them...and I'm not that old (she says...in the 40s).
Whoa, talk about a memory-jog! I remember a friend in boarding school doing the exact same thing in the fall of 1975. The down was in clear, plastic bags. He'd load the down and sew the chambers shut. We all thought he was nuts but 2 years later they were the-rage and we all had our store-bought ones!
"I sewed it all myself and loaded the down into it from plastic bags."
WOW! I'm pretty sure my brother didn't do THAT! Although, if his mom and grandma had anything to say about it he COULD have done.
They are SO warm, my down coat is still the warmest.