Just in time for winter, up-and-coming designer Alberta Bucciarelli has created a puffer like no other.

In what is believed to be a world-first, the 21-year-old knitwear designer has created a machine-knitted puffer jacket using expandable yarn, so the garment's warm filling is manufactured at the same time as its outer layers.

Made on a $A330,000 ($NZ400,000) Japanese industrial knitting machine called the Shima Seiki at the The University of Technology Sydney, it makes down- or polyester-filled utilitarian puffers look very last-season.

"When it comes off the machine, it's already stuffed, it's already filled.…