Sweaters are knit from yarn or fibers in particular designs and patterns. All sweaters were once handmade but now, sweaters are commonly mass-created and built with machines that do the knitting. Any one can actually learn the way to knit and make their particular sweaters if they are so inclined. https://johnathanskyku.dreamyblogs.com/27229329/the-smart-trick-of-vests-that-no-one-is-discussing