Washing/drying a crochet knit cotton hoodie? i got this 100% cotton crochet knit hoodie from pac sun... and...

i got this 100% cotton crochet knit hoodie from pac sun... and on the carefulness tag it say to machine valet in cold sea and then dry flat... but i be wondering would putting it in the dryer lay waste to it?
there's a very similar hoodie at forever 21:
http://www.forever21.com/product.asp?cat...
and for this hoodie it say to tumble dry low.
so what could happen if i put my hoodie contained by the dryer? would it collect those little fuzzy balls on it? or something worse?
gratitude for your help. =]
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Answers:    If you really don't want your hoodie to bring wrecked wash it within a large mesh lingerie rucksack in cold sea. Lay it flat on a towel and gently stretch it pay for to shape. Do not put it in the dryer and it will most predictable shrink not in distance but shorter by as much as 2 or 3 inches.
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depending on the type of yarn that be used to knit/crochet it, it could shrink greatly. I crochet and i always paw wash my crochet items and afterwards hang them on the shower rod to dry, unless it is a big blanket or something later i take it to a dry cleaners.