Question

Why do manufacturers use sanforizing

Answer 1

Because the item doesnt shrink if the process is used 

Answer 2

Hey there!
Sanforized fabric has some pretty good pros and cons, but consumers today don't seem to mind it too much. Sanforized fabric is a very popular item, and it's what some people even look for. Additionally, it reduces shrinking, and this is a quality that undoubtedly many consumers would be willing to pay more for, as it saves them the stress and hassle as to buy another article of clothing if theirs shrinks.
Hope this helps!