Felt your sweater. It goes against everything you
know about wool, so revel in it!
Wash your sweater in a machine on the hottest water
setting and dry on the highest heat. Use soap. The combination
of suds, heat and agitation is what turns your loose knit tight.
The consistency of a felted sweater should be dense
enough that it won't unravel. Depending on the heat, it may take
more than one washing and drying so repeat as needed.
Warning:Felting
is irreversible so have your therapist's number on hand…